Some new features and bug fixes

New:
- Added a link to pingtest.net from the ping badge
- Added a sabSpeedAdjuster() function which automatically adjusts SABnzbd+ speed limit depending on desired network ping

Fixes:
- Center services (most noticeable on portrait tablets)
- Improved ping() function so that it can handle more than a two digit ping and is smarter about how it locates the average ping
- Now Playing area now displays recently played from trakt.tv if PMS is down

Signed-off-by: Ryan Christensen <hi@ryanchristensen.net>