+ Added HAVE_GL,HAVE_GL_OVERLAY to Doxyfile defines
+ many obsolete api signature causing to be igmored by doxygen have been fixed, more to come and this is good! (we are forced to refresh these api and be up-to-date to have them documented...)
+ Added a Fl_Gl_Window::draw() method that raises a Fl::fatal() message if used directly. The old doc said it was a pure virtual which is not true. one can easily create a Fl_Gl_Window created, this won't work of course but is subject to trouble.
Now the Fl_Gl_Window doxygenize beautifully and content is more accurate.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6286 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
