Blue - v0.0.59

Adds AvatarGrid and StatusDot components

This update adds a new AvatarGrid component. It's similar to
AvatarStack and AvatarList, in that it renders an array of Avatars.
However the presentation for the avatars is different. Like AvatarList,
the new AvatarGrid component provides animations.

Example

<AvatarGrid>
  <Avatar />
  <Avatar />
  <Avatar />
</AvatarGrid>

Eventually, we'll want to update the AvatarStack and AvatarList
components to follow the same children prop convention, instead
of passing in Avatars via an avatar prop.

This update also adds a new StatusDot component, which is now
built into Avatar, and can be enabled by passing in the appropriate
status prop.

Example

<Avatar status='offline' />

Resolves: #121