Swarm logo for other media

[kostmo]

We have one version of a stylized swarm logo on the game's title screen (e.g. #1018).
However, it would be useful to have another version that is more legible at reduced size.

We may want an even more simplified version for the website favicon.

Here's an early attempt that I plan to refine:

I have some credits to use for advertising on Facebook that expire at the end of the month, to drive the priority of this.

[kostmo]

Work in progress in the new swarm-logo repo.