v1.03b Subtractive Boolean + more

This update I did more work on the Node Effects panel.  I've replaced masking, with a more useful feature Subtractive Booleans.  Subtractive Booleans will cut away at your model, revealing the underlying voxels.  Useful for quickly adding decay to say ruins, showing cross sections like the innards of a character.

- Fixed saving curve deformation stretch values