The -O extension will not work with active record users.
Do not include the AR-dependent class if no AR.
Merge pull request #30 from darrencauthon/slug_prefixes

Slug prefixes
Merge pull request #29 from darrencauthon/update_the_docs_for_ar_users

Update docs for AR users
Merge pull request #31 from darrencauthon/extract_the_slugging

Extract the slugging
Merge branch 'master' of github.com:AsheAvenue/Kilt