Approaching python3 compatibility

--HG--
branch : trunk
diff --git a/setup.py b/setup.py
index 3125599..a4f0f9d 100644
--- a/setup.py
+++ b/setup.py
@@ -87,6 +87,7 @@
     },
     extras_require={'i18n': ['Babel>=0.8']},
     test_suite='jinja2.testsuite.suite',
+    include_package_data=True,
     entry_points="""
     [babel.extractors]
     jinja2 = jinja2.ext:babel_extract[i18n]