Merge pull request #2 from CiscoSystems/multi-node

Multi node
added ceph support
added ceph::apt::ceph to osd node definition
added global path for ceph tools to work
moved ceph classes to core.pp, reflected new name in site.pp.example
added proxy support for ceph package wget.
added support for specifying which release to install.
refined ceph classes
Merge pull request #79 from dontalton/ceph

adding Ceph to grizzly manifests