This commit consists of:
1) Add session management to netconf
2) Modularize the rpc call
3) Improve the error handling
4) Small bug fixes

Change-Id: I023edb76e3743b633ac87be4967d656e09e2b970
diff --git a/netconf/grpc_client.py b/netconf/grpc_client.py
index ca6fa42..ebb74eb 100644
--- a/netconf/grpc_client.py
+++ b/netconf/grpc_client.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 #
 # Copyright 2016 the original author or authors.
 #
@@ -13,7 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-
 """
 The gRPC client layer for the Netconf agent
 """