diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger/genswagger/types.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger/genswagger/types.go
new file mode 100644
index 0000000..77db96d
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger/genswagger/types.go
@@ -0,0 +1,254 @@
+package genswagger
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway/descriptor"
+)
+
+type param struct {
+	*descriptor.File
+	reg *descriptor.Registry
+}
+
+type binding struct {
+	*descriptor.Binding
+}
+
+// http://swagger.io/specification/#infoObject
+type swaggerInfoObject struct {
+	Title          string `json:"title"`
+	Description    string `json:"description,omitempty"`
+	TermsOfService string `json:"termsOfService,omitempty"`
+	Version        string `json:"version"`
+
+	Contact *swaggerContactObject `json:"contact,omitempty"`
+	License *swaggerLicenseObject `json:"license,omitempty"`
+
+	extensions []extension
+}
+
+// http://swagger.io/specification/#contactObject
+type swaggerContactObject struct {
+	Name  string `json:"name,omitempty"`
+	URL   string `json:"url,omitempty"`
+	Email string `json:"email,omitempty"`
+}
+
+// http://swagger.io/specification/#licenseObject
+type swaggerLicenseObject struct {
+	Name string `json:"name,omitempty"`
+	URL  string `json:"url,omitempty"`
+}
+
+// http://swagger.io/specification/#externalDocumentationObject
+type swaggerExternalDocumentationObject struct {
+	Description string `json:"description,omitempty"`
+	URL         string `json:"url,omitempty"`
+}
+
+type extension struct {
+	key   string
+	value json.RawMessage
+}
+
+// http://swagger.io/specification/#swaggerObject
+type swaggerObject struct {
+	Swagger             string                              `json:"swagger"`
+	Info                swaggerInfoObject                   `json:"info"`
+	Host                string                              `json:"host,omitempty"`
+	BasePath            string                              `json:"basePath,omitempty"`
+	Schemes             []string                            `json:"schemes"`
+	Consumes            []string                            `json:"consumes"`
+	Produces            []string                            `json:"produces"`
+	Paths               swaggerPathsObject                  `json:"paths"`
+	Definitions         swaggerDefinitionsObject            `json:"definitions"`
+	StreamDefinitions   swaggerDefinitionsObject            `json:"x-stream-definitions,omitempty"`
+	SecurityDefinitions swaggerSecurityDefinitionsObject    `json:"securityDefinitions,omitempty"`
+	Security            []swaggerSecurityRequirementObject  `json:"security,omitempty"`
+	ExternalDocs        *swaggerExternalDocumentationObject `json:"externalDocs,omitempty"`
+
+	extensions []extension
+}
+
+// http://swagger.io/specification/#securityDefinitionsObject
+type swaggerSecurityDefinitionsObject map[string]swaggerSecuritySchemeObject
+
+// http://swagger.io/specification/#securitySchemeObject
+type swaggerSecuritySchemeObject struct {
+	Type             string              `json:"type"`
+	Description      string              `json:"description,omitempty"`
+	Name             string              `json:"name,omitempty"`
+	In               string              `json:"in,omitempty"`
+	Flow             string              `json:"flow,omitempty"`
+	AuthorizationURL string              `json:"authorizationUrl,omitempty"`
+	TokenURL         string              `json:"tokenUrl,omitempty"`
+	Scopes           swaggerScopesObject `json:"scopes,omitempty"`
+
+	extensions []extension
+}
+
+// http://swagger.io/specification/#scopesObject
+type swaggerScopesObject map[string]string
+
+// http://swagger.io/specification/#securityRequirementObject
+type swaggerSecurityRequirementObject map[string][]string
+
+// http://swagger.io/specification/#pathsObject
+type swaggerPathsObject map[string]swaggerPathItemObject
+
+// http://swagger.io/specification/#pathItemObject
+type swaggerPathItemObject struct {
+	Get    *swaggerOperationObject `json:"get,omitempty"`
+	Delete *swaggerOperationObject `json:"delete,omitempty"`
+	Post   *swaggerOperationObject `json:"post,omitempty"`
+	Put    *swaggerOperationObject `json:"put,omitempty"`
+	Patch  *swaggerOperationObject `json:"patch,omitempty"`
+}
+
+// http://swagger.io/specification/#operationObject
+type swaggerOperationObject struct {
+	Summary     string                  `json:"summary,omitempty"`
+	Description string                  `json:"description,omitempty"`
+	OperationID string                  `json:"operationId"`
+	Responses   swaggerResponsesObject  `json:"responses"`
+	Parameters  swaggerParametersObject `json:"parameters,omitempty"`
+	Tags        []string                `json:"tags,omitempty"`
+	Deprecated  bool                    `json:"deprecated,omitempty"`
+
+	Security     *[]swaggerSecurityRequirementObject `json:"security,omitempty"`
+	ExternalDocs *swaggerExternalDocumentationObject `json:"externalDocs,omitempty"`
+
+	extensions []extension
+}
+
+type swaggerParametersObject []swaggerParameterObject
+
+// http://swagger.io/specification/#parameterObject
+type swaggerParameterObject struct {
+	Name             string              `json:"name"`
+	Description      string              `json:"description,omitempty"`
+	In               string              `json:"in,omitempty"`
+	Required         bool                `json:"required"`
+	Type             string              `json:"type,omitempty"`
+	Format           string              `json:"format,omitempty"`
+	Items            *swaggerItemsObject `json:"items,omitempty"`
+	Enum             []string            `json:"enum,omitempty"`
+	CollectionFormat string              `json:"collectionFormat,omitempty"`
+	Default          string              `json:"default,omitempty"`
+	MinItems         *int                `json:"minItems,omitempty"`
+
+	// Or you can explicitly refer to another type. If this is defined all
+	// other fields should be empty
+	Schema *swaggerSchemaObject `json:"schema,omitempty"`
+}
+
+// core part of schema, which is common to itemsObject and schemaObject.
+// http://swagger.io/specification/#itemsObject
+type schemaCore struct {
+	Type    string          `json:"type,omitempty"`
+	Format  string          `json:"format,omitempty"`
+	Ref     string          `json:"$ref,omitempty"`
+	Example json.RawMessage `json:"example,omitempty"`
+
+	Items *swaggerItemsObject `json:"items,omitempty"`
+
+	// If the item is an enumeration include a list of all the *NAMES* of the
+	// enum values.  I'm not sure how well this will work but assuming all enums
+	// start from 0 index it will be great. I don't think that is a good assumption.
+	Enum    []string `json:"enum,omitempty"`
+	Default string   `json:"default,omitempty"`
+}
+
+type swaggerItemsObject schemaCore
+
+// http://swagger.io/specification/#responsesObject
+type swaggerResponsesObject map[string]swaggerResponseObject
+
+// http://swagger.io/specification/#responseObject
+type swaggerResponseObject struct {
+	Description string              `json:"description"`
+	Schema      swaggerSchemaObject `json:"schema"`
+
+	extensions []extension
+}
+
+type keyVal struct {
+	Key   string
+	Value interface{}
+}
+
+type swaggerSchemaObjectProperties []keyVal
+
+func (op swaggerSchemaObjectProperties) MarshalJSON() ([]byte, error) {
+	var buf bytes.Buffer
+	buf.WriteString("{")
+	for i, kv := range op {
+		if i != 0 {
+			buf.WriteString(",")
+		}
+		key, err := json.Marshal(kv.Key)
+		if err != nil {
+			return nil, err
+		}
+		buf.Write(key)
+		buf.WriteString(":")
+		val, err := json.Marshal(kv.Value)
+		if err != nil {
+			return nil, err
+		}
+		buf.Write(val)
+	}
+
+	buf.WriteString("}")
+	return buf.Bytes(), nil
+}
+
+// http://swagger.io/specification/#schemaObject
+type swaggerSchemaObject struct {
+	schemaCore
+	// Properties can be recursively defined
+	Properties           *swaggerSchemaObjectProperties `json:"properties,omitempty"`
+	AdditionalProperties *swaggerSchemaObject           `json:"additionalProperties,omitempty"`
+
+	Description string `json:"description,omitempty"`
+	Title       string `json:"title,omitempty"`
+
+	ExternalDocs *swaggerExternalDocumentationObject `json:"externalDocs,omitempty"`
+
+	ReadOnly         bool     `json:"readOnly,omitempty"`
+	MultipleOf       float64  `json:"multipleOf,omitempty"`
+	Maximum          float64  `json:"maximum,omitempty"`
+	ExclusiveMaximum bool     `json:"exclusiveMaximum,omitempty"`
+	Minimum          float64  `json:"minimum,omitempty"`
+	ExclusiveMinimum bool     `json:"exclusiveMinimum,omitempty"`
+	MaxLength        uint64   `json:"maxLength,omitempty"`
+	MinLength        uint64   `json:"minLength,omitempty"`
+	Pattern          string   `json:"pattern,omitempty"`
+	MaxItems         uint64   `json:"maxItems,omitempty"`
+	MinItems         uint64   `json:"minItems,omitempty"`
+	UniqueItems      bool     `json:"uniqueItems,omitempty"`
+	MaxProperties    uint64   `json:"maxProperties,omitempty"`
+	MinProperties    uint64   `json:"minProperties,omitempty"`
+	Required         []string `json:"required,omitempty"`
+}
+
+// http://swagger.io/specification/#referenceObject
+type swaggerReferenceObject struct {
+	Ref string `json:"$ref"`
+}
+
+// http://swagger.io/specification/#definitionsObject
+type swaggerDefinitionsObject map[string]swaggerSchemaObject
+
+// Internal type mapping from FQMN to descriptor.Message. Used as a set by the
+// findServiceMessages function.
+type messageMap map[string]*descriptor.Message
+
+// Internal type mapping from FQEN to descriptor.Enum. Used as a set by the
+// findServiceMessages function.
+type enumMap map[string]*descriptor.Enum
+
+// Internal type to store used references.
+type refMap map[string]struct{}