CFY-145 expose bootstrap context and provider context in cloudify context
Merge pull request #4 from cloudify-cosmo/feature/CFY-145-provider-context

Expose methods to read provider context and bootstrap context. add api in CloudifyContext for using these
CFY-643 added node_state property in ctx and in NodeInstance class; node update will now update node state too; modified *_node_state into *_node_instance
Merge pull request #5 from cloudify-cosmo/feature/CFY-643-changes-to-node-state

CFY-643 added node_state property in ctx and in NodeInstance class; node...
Merge branch 'develop' into feature/CFY-642-workflow-framework
CFY-642 merged from develop