Add mini_magick gem #577
Add avatar to people #577
Add AvatarUploader and mount it in person model
Add avatar field to the user form #577
Add avatar file extension validation #577
Add some test for UsersController#update
Change edit user page layout #577
Add User#avatar #577
Add support for uploaded avatar in the avatar helpers #577
Merge pull request #214 from nicolasiensen/wip_577

Add support to avatar upload #577