-Meaningful texts are provided instead of commands in File menu (e.g. restore->Load Shape (restore))
-tk_getOpenFile is used in "open file" dialogs
-tk_chooseDirectory is used in "change directory" dialog
-Added menu "Help" with submenus "System info", "Commands", "About", "User Guide"
-Added menu "Samples" with submenu "View samples"
-Added menu "Load" with submenus "pload <Module>"
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.