added rest api calls for getting and updating node state
Merge branch 'develop' into feature/CLOUDIFY-2341-plugin-decorators

Conflicts:
	cosmo_manager_rest_client/swagger/DeploymentsApi.py
	cosmo_manager_rest_client/swagger/nodes_api.py
fixed documentation and changed server url to be taken from client api
removed unused import
removed unused import
fixed update node state docstring
Merge pull request #11 from CloudifySource/feature/CLOUDIFY-2341-plugin-decorators

CLOUDIFY-2341-plugin-decorators add node state calls