revamped tests to use the new cabal testing interface

Ignore-this: bf07a09bbbf9641fcaa104d0540b9646

tests now use string comparsion instead of diffing to determine test results

.ref files were converted into hs modules exporting the same data

darcs-hash:20120913222227-08fed-71851925b9e0a2a7b67d193b8e92fac37fc95c6f