CFY-1500 implement client side attributes rest call
CFY-1500 expose get node instances by node id
CFY-1500 add types for missing server errors
CFY-1500 rename process attributes to evaluate functions
CFY-1500 rename node_id to node_name in list node instances REST call
Merge pull request #48 from cloudify-cosmo/CFY-1500-get-attribute

Cfy 1500 get attribute