[Review] Request from 'xystushi' @ 'xystushi/git-review/review_130812_send_pull_requests_to_upstream'

Please review the following changes:
  * 3900f88 Refactor create_pull_request in Commands.
  * 8015cd6 Target_repo is parent repo if sending pull request to upstream.
  * 1fcebd1 Do not load duplicate config values.
  * 62f7ee0 Correct namespacing for Internals module.
  * 84d97d1 Include Gemfile.lock and add line feed at EOF.