Profile Photos

[NfNitLoop]

Right now, profiles only contain an identicon based on their public ID.

• [ ] Add the ability to attach a profile photo w/ a profile.
• [ ] Add the ability to attach more than one profile photo.
• [ ] Add the ability to reorder attachments. (The first photo will be the main one.)
• [ ] Maintain previous profile photos (attachments) when editing a profile.
• [ ] Document which photo formats are accepted. (JPG, PNG. GIF?)

My current thinking is that profile photos will just be attachments to the Profile object. Since those are backed by a content-addressable store, editing profiles won't require re-uploading new photos.