iodide logo

This is a part of #167.

Let's use this PR as a spec, following the mozilla OpenDesign request template, w/ suggestions, debate, etc. in comments here:

## Goal:
[What you'd like created]

## Info:
[What it will be used for/where it will go]

## Style Information:
[What you want it to look like, link to references, similar things etc.]

## Deadline:
[When would you like this done by]

## Tag:
[Design Needed, Developer Needed, Question, Staff Support Needed]

Start by reading the parent issue #167 and the four comments on this issue, then use the Mozilla OpenDesign request template to determine the logo requirements. The issue is complete only when the design direction, intended use, style references, deadline, and needed support are agreed in the discussion.

Written by the indexing model from the issue text.