Merge pull request #54 from theodi/feature-manage-sections

Manage sections and modules
Add featured tag to seeds
Bump odi_content_models
Add featured tag to form
Strip out featured tag if empty
Merge pull request #55 from theodi/feature-add-featured-tag

Add Featured Tag to Artefacts
Merge branch 'master' of github.com:theodi/panopticon into feature-bump-odi-content-models