Fix typo in default attribute
set modes of directories only for git mode
correct place
Only allow one swift-proxy node

Allowing more makes nearly no sense, as the endpoint in keystone can
only point to one node.
Use new validation API in validate_proposal_after_save
Use new find_dep_proposal helper
Merge pull request #168 from jsuchome/var_cache_swift

set modes of directories only for git mode
Merge pull request #169 from vuntz/validation

Use new helpers to create/validate proposals
Merge pull request #167 from vuntz/typo

Fix typo in default attribute