Added a basic Album Detail view.
Added basic tests for the Album Detail page.
Added a basic Image Create page.

Also added basic tests for the Image Create page.
Added a basic Image List page.

Also added basic tests for the Image List page.
Added a basic Image Detail page.

Also added basic tests for the Image Detail page.
Added a basic Image Edit page.

Also added basic tests for the Image Edit page.
Added gallery models to the admin site.

Changed the app_label of ArtistTag and ArtistTaggedItem so that they
belong to the taggit app.