Fixed some logic errors in button loading w/ regard to 9-slice-scaling. Now throws error if you provide only one asset but no src_w/src_h.  XML loading is unchanged - it now deduces the proper src_w/src_h values for an "all" tagged graphic asset.
Added basic icon support to FlxUIButton.

Using these methods:

addIcon( icon:FlxSprite )
removeIcon()
changeIcon(newIcon:FlxSprite)
removing isStatic constructor argument for text classes
Fixed to bring in line with Sam's changes to flixel
Fixed issue where UI wasn't shown. Removed inline keyword from FlxUIGroup.calcBounds (bad use of inline).
Merge branch 'master' of https://github.com/HaxeFlixel/flixel-ui
Fixed bug which made checkboxes and radio buttons in a tab menu all clicked by default.
Fixed some (but not all) neko bugs
Making FlxUIPopup compatible with latest dev version of flixel.
Merge remote-tracking branch 'origin/master' into dev
TabGroup IFlxSprite casting and add() override fix.
replaced IFlxPoint with FlxPoint
fixes for latest dev
started formatting
Fix logo URL
Fix logo URL, attempt #2
Making compatibile with latest flixel
Merge branch 'master' of https://github.com/HaxeFlixel/flixel-ui

Conflicts:
	flixel/addons/ui/FlxUIPopup.hx
	flixel/addons/ui/TabGroup.hx
Fixes for changes to motion variables in  FlxSpriteGroup / FlxObject
Merge branch 'master' into dev

Conflicts:
	flixel/addons/ui/FlxUI.hx
	flixel/addons/ui/FlxUICheckBox.hx
	flixel/addons/ui/FlxUIGroup.hx
	flixel/addons/ui/IFlxUIWidget.hx