CFY-849 added support for custom parameters; missing mandatory parameters will now all appear in the given error message rather than just the first one encountered; modified .travis.yml for tests
CFY-849 fixed test
CFY-849 reverted .travis.yml
Merge pull request #64 from cloudify-cosmo/feature/CFY-849-add-parameter-for-specifying-if-custom-parameters-to-execution-is-allowed

CFY-849 added support for custom parameters; missing mandatory parameter...
CFY-846 merge with develop