HipChat dialect emoticon support.

Thanks to Henrik Nyh for the awesome emoticon index at http://hipchat-emoticons.nyh.name/
Added title attr to HipChat emoticons
HipChat dialect emoticon support.

Thanks to Henrik Nyh for the awesome emoticon index at http://hipchat-emoticons.nyh.name/
Added title attr to HipChat emoticons
Merge branch 'hipchat-emoticons' of ssh://github.com/cmtonkinson/discourse into hipchat-emoticons