Removed no longer used getcourse recipes
Cleanups: Getcourse variables

* renamed getcourse-deploy to getcourse_deploy since all others vars are using underscores
* no longer a hardcoded path for frontend_acceptance tests
* comments
* sane defaults for all params in defaults.rb
Removing getcourse-api-spec: Recipe no longer here
Merge pull request #411 from fh/t/cleanup-gc

Cleanups: Getcourse