Add parameters from the command line to the $params array.
Add new branching options to the drush rush command to allow for branching parameters to be set at runtime.
Add new git_create_branch operation which runs git checkout -b.
Move show params below adding the create branch option.
Make a test job for git clone.
Merge pull request #1 from seanbuscay/feature-branch_params

Add a new feature to create a branch of the job from the command line.