Merge pull request #107 from dirkmueller/release/roxy/master

Merge RBD Support Patches for SUSE
Improve barclamp description
Merge pull request #120 from vuntz/improve-description

Improve barclamp description
Use new validation API in validate_proposal_after_save
Use new find_dep_proposal helper
Merge pull request #123 from vuntz/validation

Use new helpers to create/validate proposals