Big update: support for blendshapes, some refactor, etc

Changelog:
- Added option to choose whether to use Write Defaults ON/OFF for states created by the script at runtime.
- Added ability to choose menu generation settings
	- Automatic: Default behavior. Automatically creates menus, organizes them automatically in the main menus (Toggles and Colors menus), and adds to them as it has previously.
	- Add to Selected Menu: New behavior, allows you to choose which menu to add controls to.
- Added ability to choose between toggle and radial puppet for the controls added to menus.
- Added ability to create toggles / blendtrees (sliders) for blendshapes.
- Misc bug fixes / optimizations.