Added

• Bounds: faster condition assessment for the overlaps method
• Renderable: added a basic NineSliceSprite renderable object
• Renderable: new offScreenCanvas option for me.Text allowing to use an individual offscreen canvas texture per text element

Fixed

• Input: fix a regression with me.input.pointer not being updated on pointer events
• Loader: fix a "double initialization and double reset" bug with the default loading screen