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.
Explicit type cast added in conversions from double to float in PrsMgr, Select3D, StdPrs, Visual3d, and Voxel.
Minor corrections in ShapeProcess and TCollection.
In Visual3d_ViewManager::ConvertCoord...(), output is initialized by zeros instead of RealLast() in case of failure.
In XmlMXCAFDoc, material density is correctly converted to string when writing to Xml.
