This command will create new vertex groups in the target mesh. All existing groups will be deleted.
All envelopes are parsed and appropriate groups created.
Important: currently Envelope Assignment expects the objects to have "Apply size and rotation" applied (CTRL-A in Object Mode). For the target mesh you have to do it by hand. The envelopes get it applied by Envelope symmetry. Later you'll not have to take care about it.
To be continued...
