Integrated the non-existant GUI into Degraph

- if the commandline option -d is given Degraph will start the GUI after analysing, whatever it has to analyze
- moved on java file to a scala directory. Otherwise gradle will complain about issues. => When in doubt java classes should be in scala folders. There they will get picked up by the scala compiler and compiled properly
Changes after Review
Merge branch 'master' of https://github.com/schauder/degraph.git
Moved class into Scala Package