Upgraded jQuery from 1.4.2 to latest 1.11.2

* Changes : Upgraded jQuery 1.4.2 to 1.11.2
* Removed depreciated api such as `browser.msie` and `live` which is replaced by `on`
* Fixed some upgrade issues

Yes the default action of link clicking should be prevented from Quickwiki modal, not from the entire wiki page in general, as we already use Shift + Left click there. Will amend the code accordingly :)