Include Gemfile.lock and add line feed at EOF.
Correct namespacing for Internals module.
Do not load duplicate config values.
Target_repo is parent repo if sending pull request to upstream.
Refactor create_pull_request in Commands.

Move code into more appropriate methods in Github and Local classes.
Don't use `and`, use `&&` always.
Merge pull request #61 from xystushi/review_130812_send_pull_requests_to_upstream

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