QUnit reorganization

QUnit reorganization
* Moved QUnit directory from /resources/test/ to /tests/qunit/.
* Includes an .htaccess file in /tests/qunit/ to allow reading this from the browser (since /tests/.htaccess disallows this by default, as it should)
* Deleted "/unit/main.css" which wasn't used for anything (was an idea I had but redundant now)
* Renamed /qunit/unit/ to /qunit/suites/
* Re-organized structure within /suites/ to match that of MediaWiki's. (ie. /resources/jquery, /resources/mediawiki.util etc.)
This will make it easier to write a "check if all JS have a test suite" thingy.
* Added a few "Clean up" sections in the test suites to remove added elements (namely added portlet links)