CLOUDIFY-2402 Added the plugin get_resource feature
CLOUDIFY-2402 updated documentation for context's get_resource method; fixed constant convention
Merge pull request #31 from CloudifySource/feature/CLOUDIFY-2402-Expose-blueprint-packaged-files-through-file-server

CLOUDIFY-2402 Added the plugin get_resource feature
Merge branch 'develop' into feature/CLOUDIFY-2600-openstack-relationship-types