Updated openstack/openstack
Project: openstack/python-heatclient  d7737df71cf0d4a671d66b0dea7ef3daaf36627b
null
Added API reference document

The API reference document is missing so addded it and enabled pep8
check for conf.py.

Change-Id: I04236c5427d7ac624781fbfc920a79f855d8cd75