Added a Venn Diagram mockup for Medium

This is a mockup that Chen should make pretty for a Medium
article that I am writing.
Added a large logo for our Changemakers profile
Modified the new website header for Medium

I'm writing a Medium article, and for the big image header,
I am adding a version of Chen's website header.
JPG version of Elasticity world rendering. Smaller

This is a 90% quality version of the massive PNG rendering of the
Elasticity in-game world. This makes for a good Medium article cover.
Updated Chen's bio.
Started working on a new way to organize text

For the new version of the Elasticity website, I'm trying to use
YAML to provide the template a consistent interface for the text.