Added username to users, and created comment model/controller
Created comment controller/model, using ajax to display comment form and add comments to list, might switch from list to table, and delete comment link only appears to comment creator. New line character in comment textarea breaks ajax and isn't displayed; need to fix. Need to write tests.
Comments now in a table, updated comment partial, and new lines don't break comment ajax.
DRY'd views, added photoable_id and photoable_type, created rake task to seed newly created fields.
Added avatar to users, if user doesn't upload avatar they get a stock avatar, and added polymorphic association to Photo
Added button to remove comment form, styled comment table a little, and wrote comment feature tests