* Work on Excutor
* Executor can now compile java files
Merge branch 'master' of https://github.com/tailcalled/GCCodeCompetition.git
* Excutor works now, but there is not yet any timeout
* Excutor can now be closed
* Duration measurement does no longer include compilation
* Attemps are now always retrievable via AttemptQueue.getAllAttempts
* Added timeout on execution
Merge branch 'master' of
https://github.com/tailcalled/GCCodeCompetition.git

Conflicts:
	GCCC/src/gccc/Task.java