PuyoEdit 0.6

Features:
-You can now undo 3D depth and element duplication. (press CTRL + D to duplicate)
-Added a "user settings" menu.
-You can now press F2 after clicking an element on the left panel, you can quickly rename it
-Select multiple "position" keyframes to offset their data while dragging and dropping an element
-CTRL to add a keyframe to the multiple keyframes selection.

Bugfixes:
-Fixed an issue where selecting an element from the left panel wouldn't update the right panel.