Distributed Code Review For Git Files

This release incorporates multiple usability improvements over the previous release, including (but not limited to): 1. More informative output when displaying a review. 2. Populate the default commit when submitting a review with the --merge flag 3. Support more complex comments by opening the default text editor if the -m flag has not been supplied 4. Add the ability to submit an arbitrary review 5. Improve the error messages when a git command fails 6. Fix a bug in the display of comment threads where the resolved status was not being properly displayed 7. Check that the parent comment exists when creating a comment with the -p flag 8. Add a reject command