Fixed a few nits in the README
Fixed a few nits in the README

These were called out in an earlier review.

Change-Id: Ib1da2606c93782641a3d7a07a1aad9ddf331d208

stackforge/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk