diff --git a/switchq/vendor/github.com/juju/version/LICENSE b/switchq/vendor/github.com/juju/version/LICENSE
new file mode 100644
index 0000000..5cec73f
--- /dev/null
+++ b/switchq/vendor/github.com/juju/version/LICENSE
@@ -0,0 +1,191 @@
+All files in this repository are licensed as follows. If you contribute
+to this repository, it is assumed that you license your contribution
+under the same license unless you state otherwise.
+
+All files Copyright (C) 2015 Canonical Ltd. unless otherwise specified in the file.
+
+This software is licensed under the LGPLv3, included below.
+
+As a special exception to the GNU Lesser General Public License version 3
+("LGPL3"), the copyright holders of this Library give you permission to
+convey to a third party a Combined Work that links statically or dynamically
+to this Library without providing any Minimal Corresponding Source or
+Minimal Application Code as set out in 4d or providing the installation
+information set out in section 4e, provided that you comply with the other
+provisions of LGPL3 and provided that you meet, for the Application the
+terms and conditions of the license(s) which apply to the Application.
+
+Except as stated in this special exception, the provisions of LGPL3 will
+continue to comply in full to this Library. If you modify this Library, you
+may apply this exception to your version of this Library, but you are not
+obliged to do so. If you do not wish to do so, delete this exception
+statement from your version. This exception does not (and cannot) modify any
+license terms which apply to the Application, with which you must still
+comply. 
+
+
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/switchq/vendor/github.com/juju/version/README.md b/switchq/vendor/github.com/juju/version/README.md
new file mode 100644
index 0000000..2d1b48b
--- /dev/null
+++ b/switchq/vendor/github.com/juju/version/README.md
@@ -0,0 +1,3 @@
+# Version [![GoDoc](https://godoc.org/github.com/juju/version?status.svg)](https://godoc.org/github.com/juju/version) 
+version is a go package for intelligent version comparisons.
+
diff --git a/switchq/vendor/github.com/juju/version/version.go b/switchq/vendor/github.com/juju/version/version.go
new file mode 100644
index 0000000..026e99f
--- /dev/null
+++ b/switchq/vendor/github.com/juju/version/version.go
@@ -0,0 +1,297 @@
+// Copyright 2012, 2013 Canonical Ltd.
+// Licensed under the AGPLv3, see LICENCE file for details.
+
+// Package version implements version parsing.
+package version
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"gopkg.in/mgo.v2/bson"
+)
+
+// Number represents a version number.
+type Number struct {
+	Major int
+	Minor int
+	Tag   string
+	Patch int
+	Build int
+}
+
+// Zero is occasionally convenient and readable.
+// Please don't change its value.
+var Zero = Number{}
+
+// Binary specifies a binary version of juju.v
+type Binary struct {
+	Number
+	Series string
+	Arch   string
+}
+
+// String returns the string representation of the binary version.
+func (b Binary) String() string {
+	return fmt.Sprintf("%v-%s-%s", b.Number, b.Series, b.Arch)
+}
+
+// GetBSON implements bson.Getter.
+func (b Binary) GetBSON() (interface{}, error) {
+	return b.String(), nil
+}
+
+// SetBSON implements bson.Setter.
+func (b *Binary) SetBSON(raw bson.Raw) error {
+	var s string
+	err := raw.Unmarshal(&s)
+	if err != nil {
+		return err
+	}
+	v, err := ParseBinary(s)
+	if err != nil {
+		return err
+	}
+	*b = v
+	return nil
+}
+
+// MarshalJSON implements json.Marshaler.
+func (b Binary) MarshalJSON() ([]byte, error) {
+	return json.Marshal(b.String())
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (b *Binary) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	v, err := ParseBinary(s)
+	if err != nil {
+		return err
+	}
+	*b = v
+	return nil
+}
+
+// MarshalYAML implements yaml.v2.Marshaller interface.
+func (b Binary) MarshalYAML() (interface{}, error) {
+	return b.String(), nil
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaller interface.
+func (b *Binary) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var vstr string
+	err := unmarshal(&vstr)
+	if err != nil {
+		return err
+	}
+	v, err := ParseBinary(vstr)
+	if err != nil {
+		return err
+	}
+	*b = v
+	return nil
+}
+
+var (
+	binaryPat = regexp.MustCompile(`^(\d{1,9})\.(\d{1,9})(?:\.|-([a-z]+))(\d{1,9})(\.\d{1,9})?-([^-]+)-([^-]+)$`)
+	numberPat = regexp.MustCompile(`^(\d{1,9})\.(\d{1,9})(?:\.|-([a-z]+))(\d{1,9})(\.\d{1,9})?$`)
+)
+
+// MustParse parses a version and panics if it does
+// not parse correctly.
+func MustParse(s string) Number {
+	v, err := Parse(s)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// MustParseBinary parses a binary version and panics if it does
+// not parse correctly.
+func MustParseBinary(s string) Binary {
+	b, err := ParseBinary(s)
+	if err != nil {
+		panic(err)
+	}
+	return b
+}
+
+// ParseBinary parses a binary version of the form "1.2.3-series-arch".
+func ParseBinary(s string) (Binary, error) {
+	m := binaryPat.FindStringSubmatch(s)
+	if m == nil {
+		return Binary{}, fmt.Errorf("invalid binary version %q", s)
+	}
+	var b Binary
+	b.Major = atoi(m[1])
+	b.Minor = atoi(m[2])
+	b.Tag = m[3]
+	b.Patch = atoi(m[4])
+	if m[5] != "" {
+		b.Build = atoi(m[5][1:])
+	}
+	b.Series = m[6]
+	b.Arch = m[7]
+	return b, nil
+}
+
+// Parse parses the version, which is of the form 1.2.3
+// giving the major, minor and release versions
+// respectively.
+func Parse(s string) (Number, error) {
+	m := numberPat.FindStringSubmatch(s)
+	if m == nil {
+		return Number{}, fmt.Errorf("invalid version %q", s)
+	}
+	var n Number
+	n.Major = atoi(m[1])
+	n.Minor = atoi(m[2])
+	n.Tag = m[3]
+	n.Patch = atoi(m[4])
+	if m[5] != "" {
+		n.Build = atoi(m[5][1:])
+	}
+	return n, nil
+}
+
+// atoi is the same as strconv.Atoi but assumes that
+// the string has been verified to be a valid integer.
+func atoi(s string) int {
+	n, err := strconv.Atoi(s)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+// String returns the string representation of this Number.
+func (n Number) String() string {
+	var s string
+	if n.Tag == "" {
+		s = fmt.Sprintf("%d.%d.%d", n.Major, n.Minor, n.Patch)
+	} else {
+		s = fmt.Sprintf("%d.%d-%s%d", n.Major, n.Minor, n.Tag, n.Patch)
+	}
+	if n.Build > 0 {
+		s += fmt.Sprintf(".%d", n.Build)
+	}
+	return s
+}
+
+// Compare returns -1, 0 or 1 depending on whether
+// n is less than, equal to or greater than other.
+// The comparison compares Major, then Minor, then Patch, then Build, using the first difference as
+func (n Number) Compare(other Number) int {
+	if n == other {
+		return 0
+	}
+	less := false
+	switch {
+	case n.Major != other.Major:
+		less = n.Major < other.Major
+	case n.Minor != other.Minor:
+		less = n.Minor < other.Minor
+	case n.Tag != other.Tag:
+		switch {
+		case n.Tag == "":
+			less = false
+		case other.Tag == "":
+			less = true
+		default:
+			less = n.Tag < other.Tag
+		}
+	case n.Patch != other.Patch:
+		less = n.Patch < other.Patch
+	case n.Build != other.Build:
+		less = n.Build < other.Build
+	}
+	if less {
+		return -1
+	}
+	return 1
+}
+
+// GetBSON implements bson.Getter.
+func (n Number) GetBSON() (interface{}, error) {
+	return n.String(), nil
+}
+
+// SetBSON implements bson.Setter.
+func (n *Number) SetBSON(raw bson.Raw) error {
+	var s string
+	err := raw.Unmarshal(&s)
+	if err != nil {
+		return err
+	}
+	v, err := Parse(s)
+	if err != nil {
+		return err
+	}
+	*n = v
+	return nil
+}
+
+// MarshalJSON implements json.Marshaler.
+func (n Number) MarshalJSON() ([]byte, error) {
+	return json.Marshal(n.String())
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (n *Number) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	v, err := Parse(s)
+	if err != nil {
+		return err
+	}
+	*n = v
+	return nil
+}
+
+// MarshalYAML implements yaml.v2.Marshaller interface
+func (n Number) MarshalYAML() (interface{}, error) {
+	return n.String(), nil
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaller interface
+func (n *Number) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var vstr string
+	err := unmarshal(&vstr)
+	if err != nil {
+		return err
+	}
+	v, err := Parse(vstr)
+	if err != nil {
+		return err
+	}
+	*n = v
+	return nil
+}
+
+// ParseMajorMinor takes an argument of the form "major.minor" and returns ints major and minor.
+func ParseMajorMinor(vers string) (int, int, error) {
+	parts := strings.Split(vers, ".")
+	major, err := strconv.Atoi(parts[0])
+	minor := -1
+	if err != nil {
+		return -1, -1, fmt.Errorf("invalid major version number %s: %v", parts[0], err)
+	}
+	if len(parts) == 2 {
+		minor, err = strconv.Atoi(parts[1])
+		if err != nil {
+			return -1, -1, fmt.Errorf("invalid minor version number %s: %v", parts[1], err)
+		}
+	} else if len(parts) > 2 {
+		return -1, -1, fmt.Errorf("invalid major.minor version number %s", vers)
+	}
+	return major, minor, nil
+}