added jbox2d libraries
created package for physics, added basic possibility for own jbox2d-tests (as described in their wiki)
only store last MAX_REC_SCREENSHOTS (currently 50) screenshots to avoid memory issues
updated .classpath
removed absolute pathes
created PhysicsSimulationAgent and place WorldObjects in the simulation (well kinda)
whatever
Merge pull request #4 from crisHH/tsschaffert/startupChanges

First version of new MainEntry.
Added level json files
added physics json files
added json file describing star limits
added basic classes to store level information
Merge pull request #5 from crisHH/platas_branch

Platas branch
added first versions of some report-parts
added some attributes
added gson libraries for JSON import
added gson libraries to classpath
added PhysicsSimulationAgent to available agents
fixed classes to store level objects
started implementing JSON import