Merge pull request #53 from jaypipes/working

Allow for overriding bind_interface
Add centos image link
Sync db after config file is generated
Merge pull request #54 from maoy/working

Various improvement
missing delimiter added
Merge pull request #55 from UshF/44114077-image-cache-maxsize

missing delimiter added
changed how the recipe looks for existing images
Merge pull request #57 from alop/create-fix

changed how the recipe looks for existing images
Update to use newer keystone register providers