Correct the misspellings of persistant to persistent in FlxState.hx.
Merge pull request #565 from rszrama/persistant-spelling-fix

Correct the misspellings of persistant to persistent in FlxState.hx.
FlxTween: Fix issue with neko
FlxSpriteGroup: Small improvements
FlxTween improvements - see issue #548
change for FlxTween.motionTween and FlxTween.pathTween
removed unneeded PathMotionType enum
OUYA button IDs
OUYA gamepad initialization
Move FlxSpecialFX to flixel-addons
some additional checks for mobile paltforms
FlxTween: Better (shorter) names for static functions
fixes for my last changes of compiler conditionals,sorry
moving Activate and Deactivate event listeners
Introduce 'FlxPlugin' as the base class for all plugins
FlxArrayUtil::indexOf(): Improve documentation
Remove tweening logic from FlxBasic and move it into a new TweenManager plugin, #548, #570
Clean up FlxGame imports
openfl_ouya compiler conditional for gamepad manager
fix for camera resize on flash target