I fixed this bug where if you drew a square, went to a blank frame, moved it, and then went to a blank frame (do nothing), and go back to a tween (between first and last frame), the tween engine would crash, and the animation would be destroyed. Fixed by wrapping SVGRenderer’s remove function in a try..catch loop.
I also split diff_core into diff_attr which allows you to diff only a single attribute at a time. I also added a diff_list function which would make it easier to implement an export format to a tweening engine like that of JavaFX and Silverlight.
On that note, I added fake support for JavaFX. so you now see the toolbar icon, and I added the script for javafx though there’s nothing in it.
