Added GPL license.

git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/EHFinder/trunk@158 2a26948c-0e4f-0410-aee8-f1d3e353619c

1 files changed, 40 insertions, 6 deletions

diff --git a/README b/README
index ba593c6..33bd88c 100644
--- a/README
+++ b/README
@@ -1,14 +1,48 @@
-Cactus Code Thorn EHFinder
-Authors    : Peter Diener
 CVS info   : $Header$
+
+Cactus Code Thorn EHFinder
+Authors    : Peter Diener <diener@aei.mpg.de>
+Maintainer : Peter Diener <diener@aei.mpg.de>
 --------------------------------------------------------------------------
 
 Purpose of the thorn:
 
 To find the event horizon of a numerical spacetime by integrating a null
-surface backwards in time. The basic equation is equation 2 in Anninos et. al,
-Physical Review Letters, 74, 630, 1995.
+surface backwards in time.
 
 The surface will be parametrized as the 0 value isosurface of a level
-set function. Hopefully this will work when the topology changes from
-one common event horizon to two individual event horizons.
+set function. This ensures that it is possible to handle cases when the
+topology changes (when evolving backwards in time) from one common event
+horizon to two (or more) individual event horizons.
+
+
+Documentation:
+
+The documentation can be found in the Thorn Guide provided with this
+Thorn. For additional details see gr-qc/0305039.
+
+
+History:
+
+This event horizon finder was written by Peter Diener in 2002-2003.
+
+
+Copyright & Licensing:
+
+This thorn is copyright (C) 2002-2003
+by Peter Diener <diener@aei.mpg.de>.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this thorn (see the file COPYING in this directory);
+if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA