Use same badges in openstack and rackspace drivers
Use semver
Bump to Test Kitchen 1.1
Change 'name' option to 'server_name'
Fix now-invalid default image ID
Update CHANGELOG
Update README for new driver config style
Merge pull request #15 from RoboticCheese/jdh-bump-tk-dep

Fix #13 - Rename 'name' option to 'server_name'