added some sidebar links

docs/_themes/local/sidebarusefullinks.html

@@ -5,6 +5,8 @@
 <ul>
   <li><a href="https://borgbackup.github.io/borgbackup/">Main Web Site</a></li>
   <li><a href="https://pypi.python.org/pypi/borgbackup">PyPI packages</a></li>
+  <li><a href="https://github.com/borgbackup/borg/issues/147">Binary Packages</a></li>
+  <li><a href="https://github.com/borgbackup/borg/blob/master/CHANGES.rst">Current ChangeLog</a></li>
   <li><a href="https://github.com/borgbackup/borg">GitHub</a></li>
   <li><a href="https://github.com/borgbackup/borg/issues">Issue Tracker</a></li>
   <li><a href="https://www.bountysource.com/teams/borgbackup">Bounties &amp; Fundraisers</a></li>