Versions returns uris and not labels

Changes to ActiveFedora's versions method requires interpreting lables
from the uri that corresponds to the version.
Merge pull request #732 from projecthydra/fedora-4/versions

Versions returns uris and not labels
Update the style on the batch edit page. Fixes #737
Merge pull request #738 from projecthydra/style_forms

Update the style on the batch edit page. Fixes #737
Use fields_for to handle the permissions form. Fixes #742