each world has its own gravity
removed inclusion of MapBuilder in TitleScene
make current running Scene globally available
removed inclusion of MapBuilder in MapScene
resolved cyclic inclusion by introducing testMapExtensions
implemented basic change to target map
stop currently running thread when newly loading a Scene by a Scene
moved test Tween implementation to MapBuilder
added todo in Tween
added stub for Texture and TextureMapping
added getter and setter for Texture to Body
define test Texture in MapBuilder
delegate from and to methods to TextureMapping
test implementation for triangle to triangle transformation
added sample create texture graphic
added resource list with origins
changed properties of sample block entities
moved texture drawing to TextureMapping
added commentary for mathematical aspects