Add copyright information to .py files

This change adds explicit copyright information too python
files files.  The copyright year used in each case is the
date of the first git commit of each file.

The goal is to allow jsoncpp to be integrated into the
chromium source tree which requires license information in
each source file.

fixes #234
diff --git a/devtools/__init__.py b/devtools/__init__.py
index c944e7c..d18a521 100644
--- a/devtools/__init__.py
+++ b/devtools/__init__.py
@@ -1 +1,6 @@
-# module
\ No newline at end of file
+# Copyright 2010 Baptiste Lepilleur
+# Distributed under MIT license, or public domain if desired and
+# recognized in your jurisdiction.
+# See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+# module
diff --git a/devtools/antglob.py b/devtools/antglob.py
index afd4c48..c272f66 100644
--- a/devtools/antglob.py
+++ b/devtools/antglob.py
@@ -1,6 +1,9 @@
 #!/usr/bin/env python
 # encoding: utf-8
-# Baptiste Lepilleur, 2009
+# Copyright 2009 Baptiste Lepilleur
+# Distributed under MIT license, or public domain if desired and
+# recognized in your jurisdiction.
+# See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
 from __future__ import print_function
 from dircache import listdir
diff --git a/devtools/fixeol.py b/devtools/fixeol.py
index a76880f..054eb9b 100644
--- a/devtools/fixeol.py
+++ b/devtools/fixeol.py
@@ -1,3 +1,8 @@
+# Copyright 2010 Baptiste Lepilleur
+# Distributed under MIT license, or public domain if desired and
+# recognized in your jurisdiction.
+# See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
 from __future__ import print_function
 import os.path
 
diff --git a/devtools/tarball.py b/devtools/tarball.py
index b2030fb..2e72717 100644
--- a/devtools/tarball.py
+++ b/devtools/tarball.py
@@ -1,3 +1,8 @@
+# Copyright 2010 Baptiste Lepilleur
+# Distributed under MIT license, or public domain if desired and
+# recognized in your jurisdiction.
+# See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
 from contextlib import closing
 import os
 import tarfile