CLOUDIFY-2449 small bug fixes
CLOUDIFY-2449 add set_started to context
Merge branch 'develop' into feature/CLOUDIFY-2449-ctx-set-started

Conflicts:
	cloudify/context.py
CLOUDIFY-2449 code cleanup
CLOUDIFY-2449 small fixes
Merge pull request #11 from CloudifySource/feature/CLOUDIFY-2449-ctx-set-started

Add set_started to node context