-input now correctly works when using viewport scaling
-added function to get areas/bodies in given point
-added function to get space state directly from world
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-Removed "density" property
-Added instead more flexible "angular damp" and "linear damp"
-Added ability to override angular and linear damp in rigidbody
-Added gravity scale option rigidbody
Test well and iron out bugs, when it works the same will be moved to 3D
