Box2D Visual Editor - Update #2

Hi, so I have add quite a lot of new features to the Box2D visual editor tool that I demonstrated a few weeks ago. What's new: • Import images for arranging and syncing with the level. This includes tools for rotating and scaling along the axis. • Edge tool for creating edges instead of polygons. Existing polygons can easily be switched to edges as well. • Added an option for exporting to JSON. • Created an importer for Apple's SpriteKit. • Created a meta data tool for assisting when