Update MANIFEST.in file.
@@ -5,7 +5,8 @@ include CHANGES.rst
include README.rst
include tox.ini
include .pylintrc
-include requirements-dev.txt
+include requirements-tests.txt
+include requirements-lint.txt
include libcloud/data/pricing.json
prune libcloud/test/secrets.py
prune requirements-rtd.txt
