Finish converting all the answer tests that don't use the CAS.

COPYING.txt

lang/en/qtype_stack.php

question.php

questiontype.php

renderer.php

stack/anstest.class.php

stack/answertest/Creating new answer tests.txt

stack/answertest/atregexp.class.php

stack/answertest/atstring.class.php

stack/answertest/simpletest/test.atregex.class.php

stack/answertest/simpletest/test.atstring.class.php

stack/answertest/simpletest/test.stringsloppy.class.php

stack/answertest/stringsloppy.class.php

version.php