Added .txt extension.

MANIFEST.in

@@ -1,4 +1,4 @@
-include CHANGES
+include CHANGES.txt
 include README.markdown
-include TODO
+include TODO.txt
 include ez_setup.py

setup.py

@@ -52,9 +52,9 @@ setup(
     packages = find_packages(os.path.join(here, 'src')),
     # put data files in egg 'doc' dir
     data_files=[ ('doc', [
-        'CHANGES',
+        'CHANGES.txt',
         'README.markdown',
-        'TODO',
+        'TODO.txt',
         ]
     )],
     install_requires = [],