Started to work on the issue 'Utilize the Artemis Framework'.
Creeps are now handled by the ESF.
The old version still exists side by side with the new one,
I'm going to remove it as soon as the new one is complete.

Originally I was planning to commit as soon as I've replaced
the whole OOP entity structure with the ESF but I'm committing now
because I have the urgent need to reinstall my OS.