Log Message:
py-ncclient: updated to 0.6.3

v0.6.3:
Fix homepage link registered with PyPi
SSH Host key checking
Updated junos.py to resolve RestrictedUser error
Close the channel when closing SSH session
invoke self.parse() to ensure errors, if any, have been detected before check in ok()

v0.6.2:
Migration to user selectors instead of select, allowing higher scale operations
improved netconf:base:1.1 parsing
Graceful exit on session close