Merge branch 'dev' of https://github.com/HaxeFlixel/flixel into dev
Merge branch 'dev' of https://github.com/HaxeFlixel/flixel into dev
Merge branch 'dev' of https://github.com/HaxeFlixel/flixel into dev
Merge branch 'dev' of https://github.com/HaxeFlixel/flixel into dev
Added FlxKey#toString()
Checks for an exception

If l is bigger than _tileObjects.length then there is an exception when trying to access the null tile. (In row 602) The user also must be warned about the error, because probably he haven't supplied the correct Tile or Range parameter.
Add FlxKeyManager and FlxBaseKeyList for less redundancy across FlxKeyboard and FlxAndroidKeys
FlxAndroidKey compile fix, closes #1291
FlxAssets.buildFileReferences() fixes for iOS builds by @modjke, closes 1276
Update FlxAssets.hx
Merge pull request #1289 from SergioB/patch-4

Checks for an exception
Improve #1289 error message
FlxAssets is now properly handling ios target
Removed unnecessary conditionals from FlxAssets
Merge pull request #1294 from modjke/dev

FlxAssets is now properly handling ios target
FlxConditionals: fix FLX_NATIVE_CURSOR definition
FlxMouse: fix some FLX_NATIVE_CURSOR conditionals
FlxConditionals: add warning for invalid "FLX_"-conditionals
FlxKeyboard#new(): fix missing ALT-key / less redundancy
PostProcess: add error message if setUniform() fails