Allows to configure the shape of avatars instead of boring circle.

#### Square:

![Square](img/square.png)

#### Rounded corners:

![Rounded corners](img/rounded_corners.png)

#### Circle:

![Circle](img/circle.png)

#### Triangle:

![Triangle](img/triangle.png)

#### Pentagon:

![Pentagon](img/pentagon.png)

#### Tapered square:

![Tapered square](img/tapered_square.png)