Version 1.0.22 release

- Fetching statuses is now done for all, not just updated PRs.  This
means that status items will not be updated property but each refresh
may eat up a lot of API allowance, so it now happens once every 10
refreshes by default (configurable via preferences)
- Trailer will no longer fetch orgs or list the user's repos, but will
base all processed repos on the user's watch list, which allows far
greater flexibility on what they can select in the Repos list.
- Postprocessing PRs after a sync happens only to new or updated PRs
for improved performance.
- Added indexes to speed up various DB lookup operations.
- Menu icon should be stronger and less fuzzy in the menubar,
especially on non-retina displays.