test script: Implemented disbaling enabling of tests.
Fix boom tests.

Programs now need to be syntactically valid even if they statically
crash before finishing successfully.
test script: allow diving a test name or filename
Merge branch 'master' of github.com:SWP-Ubau-SoSe2014-Haskell/SWPSoSe14
test script: fix not unsetting a variable and nicer output.
test script: Added -r option to run all not enabled tests.
enable pos_IO test