[+] added FlxTilemapParams class for storing data
[+] added helper methods to FlxTileUtil
[*] fixed flash support (still ugly while drawing, needs improving)
[~] move all work to experimental class Tilemap2
[~] use FlxPoint instead Array<Float> for non-flash targets in FlxTileUtil
[+] added stubs for calculating draw range methods
[~] revert changes to original dev version of FlxTilemap
[~] finishing FlxTilemap and FlxTilemap2 separation
[*] fixed width and height calculation
[*] fixed debug drawing on non-flash targets