Adding Tetgen version 1.3

Tetgen/LICENSE

+TetGen License
+--------------
+
+The software (TetGen) is licensed under the terms of the  MIT  license
+with the following exceptions:
+
+Distribution of  modified  versions  of this code is permissible UNDER
+THE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THE
+SAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OF
+THE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELY
+AVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE 
+MODIFICATIONS.
+
+Distribution of this code for  any  commercial purpose  is permissible
+ONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.
+
+The full  license text is reproduced below.
+
+This means that TetGen is no free software, but for private, research,
+and  educational purposes it  can be  used at  absolutely no  cost and
+without further arrangements.
+
+
+For details, see http://tetgen.berlios.de
+
+==============================================================================
+
+TetGen
+A Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator
+Version 1.3 (Released on June 13, 2004).
+
+Copyright 2002, 2004  Hang Si
+Rathausstr. 9, 10178 Berlin, Germany
+si@wias-berlin.de
+
+Permission is hereby granted, free  of charge, to any person obtaining
+a  copy  of this  software  and  associated  documentation files  (the
+"Software"), to  deal in  the Software without  restriction, including
+without limitation  the rights to  use, copy, modify,  merge, publish,
+distribute,  sublicense and/or  sell copies  of the  Software,  and to
+permit persons to whom the Software  is furnished to do so, subject to
+the following conditions:
+
+Distribution of  modified  versions  of this code is permissible UNDER
+THE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THE
+SAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OF
+THE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELY
+AVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE 
+MODIFICATIONS.
+
+Distribution of this code for  any  commercial purpose  is permissible
+ONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.
+
+The  above  copyright  notice  and  this permission  notice  shall  be
+included in all copies or substantial portions of the Software.
+
+THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT  SHALL THE AUTHORS OR COPYRIGHT HOLDERS  BE LIABLE FOR ANY
+CLAIM, DAMAGES OR  OTHER LIABILITY, WHETHER IN AN  ACTION OF CONTRACT,
+TORT  OR OTHERWISE, ARISING  FROM, OUT  OF OR  IN CONNECTION  WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+==============================================================================
\ No newline at end of file

Tetgen/Makefile

+# $Id: Makefile,v 1.3 2005-06-29 09:52:59 tardieu Exp $
+#
+# Copyright (C) 1997-2005 C. Geuzaine, J.-F. Remacle
+#
+# 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 program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+# USA.
+# 
+# Please report all bugs and problems to <gmsh@geuz.org>.
+
+include ../variables
+
+
+LIB     = ../lib/libGmshTetgen.a
+INCLUDE = -I../Common -I.
+# Do not optimize (same as Triangle...) 
+#CFLAGS  = ${OPTIM} ${FLAGS} ${INCLUDE} -DNO_PARALLEL_THREADS -UWIN32 
+CFLAGS  =  ${FLAGS} ${INCLUDE} -DNO_PARALLEL_THREADS -UWIN32 
+
+SRC =  predicates.cxx  tetgen.cxx
+OBJ = ${SRC:.cxx=.o}
+
+.SUFFIXES: .o .cxx
+
+${LIB}: ${OBJ} 
+	${AR} ${LIB} ${OBJ} 
+	${RANLIB} ${LIB}
+
+.cxx.o:
+	${CXX} ${CFLAGS} -c predicates.cxx
+	${CXX} ${CFLAGS} -g -DTETLIBRARY -c tetgen.cxx
+
+clean:
+	rm -f *.o
+
+depend:
+	(sed '/^# DO NOT DELETE THIS LINE/q' Makefile && \
+	${CXX} -MM ${CFLAGS} ${SRC} \
+	) >Makefile.new
+	cp Makefile Makefile.bak
+	cp Makefile.new Makefile
+	rm -f Makefile.new
+
+# DO NOT DELETE THIS LINE
+tetgen.o:predicates.cxx tetgen.cxx tetgen.h