first shader graph editor commit
fixed issue 1515, contactlistener isn't called on destroyBody/Joing
Fix Issue 1543

Write class information for enums when the type is not known.
added Bresenham for 2D
merged master
Added accelerometer support to IOSInput in RoboVM backend.
added GridPoint2, GridPoint3, for integer positions
modified CHANGES
Merge pull request #509 from ntherning/master

accelerometer fix
Add tiled-preprocessor to build.
fixed android native build
Merge branch 'master' of https://github.com/libgdx/libgdx
updated robovm binaries...