Fixed some things that I felt were missing or broken from the proxy system.
New option to fit in reverse direction to convert a character-specific mesh to a generic proxy.
Fixed fitting of meshes that are very close to the skin (basically tested by fitting a trivially modified copy of the body mesh itself).
New options to do more precise fitting by turning off some normally useful smoothing passes (again, intended basically for alternative body topologies).
Fixed some things that I felt were missing or broken from the proxy system.