Technical and water stuff

-added BaseObj-Generator
-added WarpToWarp
-added WarpToXYS (teleport)
-added Keyhole
-added experimental RollingRock (Circle-Collision)
-added WaterArea
-added Blooper
-added CheepCheep
-changed BaseObj.process() to
- BaseObj.doAI()
- BaseObj.doRender()
-added player ability to grab & throw items