N1KV client support.
Merge branch 'n1kv-havana' of https://github.com/CiscoSystems/python-neutronclient into n1kv-havana

Conflicts:
	neutronclient/neutron/v2_0/credential.py
	neutronclient/neutron/v2_0/networkprofile.py
	neutronclient/neutron/v2_0/policyprofile.py
	neutronclient/shell.py
	neutronclient/v2_0/client.py