do not include large integration tests into sdist

Author: Kriechi

MANIFEST.in

@@ -4,6 +4,8 @@ graft test
 prune bench
 prune docs/build
 prune utils
-prune tasks.py
+exclude tasks.py
+exclude test/test_fixtures/*/*.json
+exclude test/test_hpack_integration.py
 include README.rst LICENSE CHANGELOG.rst CONTRIBUTORS.rst tox.ini Makefile
 global-exclude *.pyc *.pyo *.swo *.swp *.map *.yml *.DS_Store