Change jQuery to $j. Fixes #15

Twitch is adding the `jQuery.fn.popup` method on to the `$j` object
instead of `jQuery` as they use `noConflict()`. Unable to pin down why
this only happened when BetterTTV's chat bar is enabled--perhaps
execution timing, but this change has been tested extensively on all
browsers with and without BetterTTV.
Fix width change for the chat button.
Change sort order to a "stable" sort. Fixes #14
Exclude certain URLs to prevent errors. Fixes #17
Add toggle for popular emotes location. Fixes #18
Fix emote menu button transparency

Initially used a scaled down grey-scaled version of the `:)` emote which
didn't look good against dark backgrounds. Instead, switched to the
original colored emote and just scaled down which looks much better
against dark backgrounds.
Version bump
Merge remote-tracking branch 'origin/dev'