Added bevry

Sorry for the delay on this, had to get our logo in SVG format, a very difficult exercise.

Logo is also available in two other formats:

https://github.com/bevry/designs/blob/master/bevry/avatars/No%20Shadow/avatar.svg

https://github.com/bevry/designs/blob/master/bevry/avatars/No%20Shadow/avatar-clipped.svg