Fixed some minor stuff in FlxScreenGrab
Merge branch 'dev' of http://www.github.com/HaxeFlixel/flixel-addons into dev

Conflicts:
	flixel/addons/plugin/screengrab/FlxScreenGrab.hx
Removed FillStyle

Replaced with FillColor : FlxColor
Working on transitions
Basically works. Now need to make it extensible.
More progress on the Transitions!
Basic transition implementation done -- two types, Fade and Tile
Added diagonal gradients to TransitionFade
Cleaned up FlxG.switchState transition a bit.
Merge pull request #96 from MSGhero/dev

Update for HaxeFlixel/flixel#1263
Transitions: removed "include", switched it to embedded assets. Switches timer variable to FlxTimer, adds FlxMath.bound check
Transitions: Refactored a bit to avoid hacks, renamed FlxTransitionState to FlxTransitionableState
Merge branch 'dev' of http://www.github.com/HaxeFlixel/flixel-addons into dev
Merge branch 'dev' into transitions
Transitions: more cleanup
Transitions: Fixed wrong IDestroyable interface, added Duration to TransitionData constructor
Transitions: A little more cleanup
Transitions: fixing visual artifact
Refactored FlxNapeState into FlxNapeSpace

Previously it was impossible to use nape integration in conjunction with FlxUIStates, by refactoring FlxNapeState into a plugin this is now possible.
Instead of extending FlxNapeState, a FlxNapeSpace.init(); call is now required at the start of the state's create().

napeDebugEnabled has been renamed to drawDebug (consistent with FlxG.debugger.drawDebug).
Update for HaxeFlixel/flixel#1281