Revert "Merge branch 'experimental' of https://github.com/HaxeFlixel/flixel into experimental"

This reverts commit ea0c7c0bcd901afb1766c8f0eaf58e43ddedbcf9, reversing
changes made to 5a1503ca00e410df1bad6c3cb6c137b33f090265.
Undoing bad merge. Adding Gamma's changes to include.xml [fe7ba215402c5ac2862540d9488eff600886e530]