jQuery events model / documentation unification / StickySubject / RemoveIgnore

* Updated all plugins to use the jquery events model. (Timeago relies on https://github.com/candy-chat/candy/pull/103)
* Documentation updated to a unified form (README + inline)
* StickySubject added - Sets the subject to be sticky in the tab and allows the chat to scroll underneath it.
* RemoveIgnore added - Remove the ignore option from the roster
* Timeago - Split the jquery plugin from the candy plugin
* InlineImages - Removed the need to override `Candy.Util.Parser.linkify`
* Unified case and file names