Increase Avatar border and change shadow color

![device-2016-05-16-123230](/uploads/8000fb506ee91e61149f838b3f661b46/device-2016-05-16-123230.png)
![device-2016-05-16-123251](/uploads/723bf452704f18b519c3fbdc469595a7/device-2016-05-16-123251.png)

See merge request !190