Added license and readme content.

COPYING

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+License Applicability. Except to the extent portions of this file are
+made subject to an alternative license as permitted in the SGI Free
+Software License B, Version 1.1 (the "License"), the contents of this
+file are subject only to the provisions of the License. You may not use
+this file except in compliance with the License. You may obtain a copy
+of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+
+http://oss.sgi.com/projects/FreeB
+
+Note that, as provided in the License, the Software is distributed on an
+"AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+
+Original Code. The Original Code is: OpenGL Sample Implementation,
+Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+Copyright in any portions created by third parties is as indicated
+elsewhere herein. All Rights Reserved.
+
+Additional Notice Provisions: The application programming interfaces
+established by SGI in conjunction with the Original Code are The
+OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+Window System(R) (Version 1.3), released October 19, 1998. This software
+was created using the OpenGL(R) version 1.2.1 Sample Implementation
+published by SGI, but has not been independently verified as being
+compliant with the OpenGL(R) version 1.2.1 Specification.

README

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+Some platforms have GLU libraries that don't behave properly in certain
+respects, and some Coin users have particular needs wrt. Coin's use of
+GLU. For these users, we (at Kongsberg Oil & Gas Technologies) have
+created a fork of SGI GLU 1.3 named SuperGLU that we have tweaked in
+certain ways.
+
+This library can be checked out into the Coin source code directory,
+which will be detected at configure-time and linked statically into
+Coin and used instead of the GLU libraries on the host system.