revert "removed GPL license file and stripped GPL headers"

This reverts commit f04d3ede7dbb6d3edd6a9865ebf88c5e6d82f18e.

Conflicts:
	src/codegen.cc
	src/ctinput.cc
	src/exports.cc
	src/fsmcodegen.cc

1 files changed, 17 insertions, 0 deletions

diff --git a/src/tree.c b/src/tree.c
index 524fa529..1ec604e6 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -2,6 +2,23 @@
  *  Copyright 2007-2012 Adrian Thurston <thurston@complang.org>
  */
 
+/*  This file is part of Colm.
+ *
+ *  Colm 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.
+ * 
+ *  Colm 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 Colm; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
 #include <colm/pdarun.h>
 #include <colm/tree.h>
 #include <colm/pool.h>