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.
Optimization of process of surface discretization: increase the number of parametric points in case of a complex surface geometry (BSpline and Bezier surfaces).
Small correction process of building subgrid in Extrema_GenExtPS::FindSolution().
Minor corrections (formatting, duplicate statements)
