Allow forcing an emote to be shown

Set `emote.hidden` to `false` to force it to be shown.
Implement browserify
Remove positioning hack and change where menu...

...button is inserted. Fixes #63.
Float the menu button to match other Twitch buttons
Version bump v0.6.4
Rework storage, fixes #59
Merge remote-tracking branch 'origin/dev' into rework-thirdparty
Shorten third party parsing and remove special...

...styling on third party emotes. In conjunction with
c95f412379632a815152766be557341aa144a9a3 this resolves part of #52.