Update README.md
Merge branch 'grizzly' of https://github.com/rackerjoe/keystone into grizzly
Merge pull request #86 from galstrom21/grizzly

Pulling in rackerjoe's grizzly work
Merge pull request #89 from rackerjoe/grizzly

Grizzly changes for keystone
remove strict package versioning and use do_package_upgrades flag