Removed Hammer from uns.cei2014.minijava.tester to the main package, in
order to consolidate imports.
Generate output file only when there is a successful compilation.
Move all Dewey tests to their appropriate stages within the
PixieDustTree tester.
If there is a need to test the actual executable code, the batch script
must be used.
Merge pull request #65 from lunaskyrise/pixie-dust-tree

update PixieDustTree testers and code generation