Notifiers are now loaded into memory on demand.
Add bubble links to Notifications config tabs.
Add Discordapp notifier to Notifications config/Social.
Add Gitter notifier to Notifications config/Social.
Change order of notifiers in Notifications config tabs.
Remove Pushalot notifier.
Remove XBMC notifier.
Refactor update_library, notify, test notify and test results functions.
Change most IDs and vars consistent for HTML, CSS, JS, and Python - related to notifications, camelCase for JS, underscore separated lower_case for python, hyphen separated-lowercase for CSS. A couple of exceptions have been left untouched in this clean up.
Change commented out some unused vars in preparation for later removal.
