v0.3.0: Merge pull request #2 from datadrivers/dev
- Remove wrapper methods like Repository[Apt|Docker][Create|Read|Update|Delete] and use lower level methods Repository[Create|Read|Update|Delete].
- Add Format type constants
- Add Repository type constants
- Add data structs for Bower, Cleanup, Group, HTTClient, HTTPClientAuthentication, HTTPClientConnection, Maven, NegativeCache and Proxy
- Fix json marshal "omitempty" for several structs