Adds custom RSS provider ratio setting.

Adds ratio setting to the custom RSS provider.
Added trending shows feature, this allows you to choose from a wide selection of popular/trending shows with rating stats and easily add the show into SR by simply clicking the plus sign.
Fixed start/restart/shutdown issues including any issues with daemonizing.
Fixed startup/restart/shutdown issues on Windows, Linux, FreeBSD platforms tested.

Fixed for updating issues.

Fixed high cpu and memory usage.
Merge remote-tracking branch 'origin/dev'
Testing fix for post-processing and search issues.
TPB season pack searches fixed
Fix for torrentday uid issues.
Fix for hdtorrents uid issues.
Merge remote-tracking branch 'origin/dev'
Send notifications to all enabled notifiers upon SickRage update.
Add global option to disable SickRage update notifications via notifiers.
Merge pull request #624 from rawsonm88/feature/update_notifications

Notify users on SickRage update via notifiers
Lowered CPU usage even further, re-wrote daemonizer code for startups, removed misc unrequired functions from providers.
SickRage now uses a internal name cache comprised of (showlist, scene exceptions, scene names) used to search and create show objects from which is needed for parsing search results.

Scene exceptions now uses a internal cache for scene exceptions and scene season exceptions, helps reduce overhead to DB and performs faster lookups when making scene exception requests.
Merge remote-tracking branch 'origin/dev'
Regex order of placement in list now taken into account when scoring matches.
Notify on update for notifiers via email has been disabled for now till we re-write the email notification code better, fixed a few small errors here and there.
PEP8 Cleanups
Merge remote-tracking branch 'origin/dev'