Initial version of a fully OpenGL-3.0-compliant of the famous smooth.c from the

Initial version of a fully OpenGL-3.0-compliant of the famous smooth.c from the
Red Book. What has been done already:

   * Explicitly request a forward-compatible 3.0 context

   * Report GL errors, if any, at a few crucial places

   * Replaced gluOrtho2D with a home-grown matrix + glLoadMatrixf

What remains to be done:

   * Use vertex shaders and fragment shaders

   * Use vertex buffer objects

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@774 7f0cb862-5218-0410-a997-914c9d46530a