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.
Method Standard::Free() is converted to template, so that pointer is nullified using its proper type.
Unnecessary type cases in calls to Standard::Free(), Standard::Reallocate(), and NCollection_BaseAllocator::Free() eliminated throughout OCCT code.
