CFY-455 better error message when list deployments returns an empty result and no blueprint id was specified
CFY-455 handle case when deployment does not exist on list deployment executions
CFY-455 handle 404 when fetching events for a non existent execution id
CFY-455 improve output
CFY-455 travis workaround
CFY-455 remove travis workaround
Merge pull request #6 from cloudify-cosmo/feature/CFY-455-error-when-needed

Verify execution exists when fetching events