Dual-licence the code under GPL and Revised BSD Licence.

Author: smarnach

COPYING.BSD

@@ -0,0 +1,24 @@
+Copyright 2012 Sven Marnach
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * The names of its contributors may not be used to endorse or promote
+      products derived from this software without specific prior written
+      permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL SVEN MARNACH BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

COPYING renamed to COPYING.GPL

@@ -60,13 +60,11 @@ Licence
 
 PyExifTool 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 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the licence, or
+(at your option) any later version, or the BSD licence.
 
 PyExifTool 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.
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
-You should have received a copy of the GNU General Public License
-along with PyExifTool.  If not, see http://www.gnu.org/licenses/.
+See COPYING.GPL or COPYING.BSD for more details.

README.rst

@@ -6,16 +6,14 @@
 #
 # PyExifTool 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 3 of the License, or
-# (at your option) any later version.
+# the Free Software Foundation, either version 3 of the licence, or
+# (at your option) any later version, or the BSD licence.
 #
 # PyExifTool 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# You should have received a copy of the GNU General Public License
-# along with PyExifTool.  If not, see <http://www.gnu.org/licenses/>.
+# See COPYING.GPL or COPYING.BSD for more details.
 
 """
 PyExifTool is a Python library to communicate with an instance of Phil

exiftool.py

@@ -5,16 +5,14 @@
 #
 # PyExifTool 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 3 of the License, or
-# (at your option) any later version.
+# the Free Software Foundation, either version 3 of the licence, or
+# (at your option) any later version, or the BSD licence.
 #
 # PyExifTool 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# You should have received a copy of the GNU General Public License
-# along with PyExifTool.  If not, see <http://www.gnu.org/licenses/>.
+# See COPYING.GPL or COPYING.BSD for more details.
 
 from distutils.core import setup