Xtension work.
More work on Xtension.
Work on Xtensions.
More work on Xtensions.
Bug fixes for Xtensions.
Another Xtension bug fix.
Solved a physics issue; more yet remain.
Reverted from SDL2-2.0.1-win32-x86 to SDL2-2.0.0-win32-x86 to fix editor input bug.