Fix of the persistence bug (exception with message "Persistant CurveRep is Null").
Creating new draw command for testing CR24565
Revert license header corruption
Correction for new draw command OCC24565
Test case for issue CR24565
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast
Wrong license statements corrected in several files.
Copyright and license statements added in XSD and GLSL files.
Copyright year updated in some files.
Obsolete documentation files removed from DrawResources.
