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
CLOUDIFY-2433 fixed capabilities impl
Merge branch 'develop' of github.com:CloudifySource/cosmo-celery-common into develop
CLOUDIFY-2433 raise KeyError if capability not found
CLOUDIFY-2370 remove includes logic + make necessary adjustments
Merge branch 'feature/CLOUDIFY-2370-plugins-as-python-libs' of https://github.com/CloudifySource/cosmo-celery-common into feature/CLOUDIFY-2370-plugins-as-python-libs