List git branches. Also, if session expires, logout.
Add a git branch.
List environments; includes support for NOT CREATED environments.
Git branch deletion.
Multidev site environment creation.
Delete a multidev environment.
Merge branch 'master' into git-ops

Conflicts:
	terminus.drush.inc
Cleanup.
Remove deprecated TODO
Merge pull request #101 from pantheon-systems/git-ops

Git and multidev operations.