Several updates from John and myself.

Several updates from John and myself.

The broad outlines are:

 * Color schemes are now in variables, are closer to old GLUT, and
   are system dependant (as old GLUT did).
 * You can change the font to any bitmapped font more easily, which
   can aid in finding a better approximation.  (Old GLUT does not seem
   to have used a GLUT font for the menus, which causes problems for
   us.)  The menus rescale automatically, including the triangle "arrow"
   for sub-menus.
 * Menus have real borders, and the placement of highlighting is
   much improved.

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@215 7f0cb862-5218-0410-a997-914c9d46530a