Split Library JS Files from custom code

To make refacroring more easy, we moved the library files to a separate folder,
New structure:
- media/js
    - libs (Libraries like jQuery, Less, ...)
    - plugins (External Plugins like Tinymce, WMD, Fancybox,  ...)
    - askbot (all custom code)

*list of javascript files that are not used*
- jquery-1.4.3.js
- jquery-migrate-1.2.1.js
- jquery.animate-colors.js
- jquery.i18n.js
- jquery.fancybox-1.3.4
- autocompleter.js
- jquery-fieldselection.js
- jquery.ajaxfileupload.js
- jquery.openid.js (directly in js folder)
- output-words.js