Adds commit functionality back into RepositoryPane.
# To cancel this commit, close this file without making a change. To commit,
# write your message, then save and close the file.
#
# On branch master
# Your branch is ahead of 'origin/master' by 3 commits.
#
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# modified: giterdone/__init__.py
# modified: giterdone/filebrowsercontroller.py
# modified: giterdone/repository.py
# modified: giterdone/repositorypane.py
# modified: giterdone/windowcontroller.py
#