* Fixed the makefile to only run enabled tests, instead of every file in the director...

* Fixed the makefile to only run enabled tests, instead of every file in the directory with "test" in its name. Did this by moving the test list to a common PHP file, accessible by both the makefile and a new PHPUnit_TextUI_Command subclass.
* Removed the perl dependency from the default "make test". There doesn't seem to be a memory issue anymore, but you can always use one of the non-default targets if it recurs.
* Fixed a couple of test/suite names broken in r68544.
* Added custom CSS to Special:Selenium, accidentally missing from r68555.