Stereographic changes for revisions 20873:20874

Changes in GeoTools header only. The removal of the "or (at your option) any later version" clause must be keep in Geotk for every classes having contribution from a developer other than those who accepted re-licensing. This header does not apply to Apache SIS, since the above-cited contributions are omitted.

Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r20873:20874 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/referencing/operation/projection/Stereographic.java
Revision 20873Revision 20874
/*
 * Geotools - OpenSource mapping toolkit
 * (C) 2003, 2004, Geotools Project Managment Committee (PMC)
 * (C) 2001, Institut de Recherche pour le Développement
 * (C) 2000, Frank Warmerdam
/*
 *    GeoTools - OpenSource mapping toolkit
 *    http://geotools.org
 *
 *   (C) 2003-2006, Geotools Project Managment Committee (PMC)
 * (C) 2003, 2004, Geotools Project Managment Committee (PMC)
 * (C) 2001, Institut de Recherche pour le Développement
 * (C) 2000, Frank Warmerdam
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*    Lesser General Public License for more details.
*
*
*    This package contains formulas from the PROJ package of USGS.
*    USGS's work is fully acknowledged here. This derived work has
*    been relicensed under LGPL with Frank Warmerdam's permission.
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*    Lesser General Public License for more details.
*
*    This package contains formulas from the PROJ package of USGS.
*    USGS's work is fully acknowledged here. This derived work has
*    been relicensed under LGPL with Frank Warmerdam's permission.