feat(avatars): profile images

Getting there! Feel free to start looking @shane-tomlinson @pdehaan.

Still needs:
- [ ] profile-server client
- [ ] progress indicator screen
- [ ] unit tests for camera view
- [ ] unit tests for cropper widget
- [x] circular overlay on cropper
- [ ] functional tests
I meant to leave it there, but in general do we want to log error messages for debugging or more advanced users who report issues? I think there are a couple other instances of us logging errors to the console.