Don't make tab move the subtitle focus (#965)

The issue was that bound the tab key to 2 different actions:
play/pause and navigating to the next subtitle.  When the user hit it,
we were doing both.  In the case of 1 subtitle, we would just let that
subtitle lose focus.

Changed it so tab only toggles play/pause.  Also made the other
keybindings when editing subtitles (enter/escape), not propagate
upwards.  This way if we add a global keybinding for one of those, we
won't have both actions fire at once, which was a confusing part of
this issue.
Update integration repo (#915)
Fixed generating counts for the video sitemap

This fixes a really slow query that's been taking the site down.
Step using eventlet celery pool.

Now that we fixed billiard to version 2.7, we can go back to
processes.
Build docker images automatically on the first run
Removed command to change /etc/hosts

This was needed for docker version 0.6.1, but in the latest version
(0.6.5) it's no longer needed and in fact causes in an error.
Removed EXPOSE statements from the Dockerfiles

Docker no longer supports specifying the public port in EXPOSE
statements.  Instead, made the scripts use the -p flag when starting
the container to accomplish the same thing.

Added the "shutdown.py --rm" command, which should shutdown the
containers and also remove them.
Update integration repo to fix #915
Bumping integration repo to fix #1017
Fix dialog header when saving only notes (#931)