Items outstanding:

 * Checkout $PARENT version to working directory, overwriting current
   version.  ($PARENT is HEAD, except when amending).

 * Update index with $PARENT version but leave working directory
   alone.

 * Populate the pull menu with local branches.

 * Populate the pull menu with default merge branch from each remote.

 * Make use of the new default merge data stored in repo-config.

 * Indicate what the current branch is.

 * Checkout or create a different local branch.

 * Delete a local branch.

 * Store user preferences (like font, window layout) in global
   repo-config.

 * Better organize fetch/push/pull console windows.

 * Clone UI (to download a new repository).

 * Remotes editor (for .git/config format only).

 * Show a shortlog of the last couple of commits in the main window,
   to give the user warm fuzzy feelings that we have their data
   saved.