[Review] Request from 'tboerger' @ 'b4mboo/git-review/review_131011_bitbucket'

Please review the following changes:
  * 1d0cf50 Integrated bitbucket authentication and renamed keys for config
  * 09a0745 remove obsolete stubs
  * df28c82 respect correct remote
  * 2cb0f72 find remote for branch name
  * 2dd5534 refactor moving local changes
  * 41eab33 refactor prepare command
  * 55ad427 remove unnecessary context blocks
  * c75f141 move create_pull_request to provider