GL_REGAL_proc_address extension adding glGetProcAddressREGAL
refresh GLEW and use glGetProcAddressREGAL in GLEW_REGAL mode
improved support of NV_path_rendering entry points
fix for glewinfo when using Regal on OSX
fix Linux build of RegalGLU and RegalGLUT
tiger example works on Linux and OSX now