Do not run semantic analysis for PrettyPrinter
Add createClassType
Add some basic FIRM node creation

See testTransform() in FirmTypesUtilTest and foo-00-testTransform.vcg
for the generated graph. Code is very rough and potentially completely
the wrong approach so feel free to overwrite it if you have something
better ;)
Fix wrong import
Merge branch 'master' of github.com:OliverSch/compiler