netconf client support and disable-enable support

Change-Id: Idd9bbdd15f59783abf3c70745d3a00e00177687e
diff --git a/requirements.txt b/requirements.txt
index c63fc59..7009e4e 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,6 +47,8 @@
 zmq>=0.0.0
 pyzmq>=16.0.2
 txZMQ==0.8.0
+ncclient==0.5.3
+xmltodict==0.11.0
 dicttoxml
 
 # python-consul>=0.6.1  we need the pre-released version for now, because 0.6.1 does not