Favicons

[soniktrooth]

I have written up a wiki page documenting best practicing regarding favicons:
https://kalamuna.atlassian.net/wiki/spaces/KALA/pages/163971173/Favicons

This contains some boilerplate code that could live in this module so we don't have to think about it ever again.

There are two cards related to this on the Tech board:
https://trello.com/c/s3EtctD4/62-favicons-in-teh-derpals
https://trello.com/c/q7K9l4vU/61-integrate-realfavicongenerator-into-kalastatic

Also:
kalamuna/kalastatic#511