update workshops with Rails Girls Next info

WARNING currently contains stuff you probably don't want on the public site.  I'm tired atm tho.  Give me feedback and I'll force-push this branch tomorrow-ish.

BTW, I'm not game to touch the CSS.  There's an issue with overlap at some resolutions; [see here](https://www.dropbox.com/s/foidhhvm9hhwdhq/Screenshot%202014-01-12%2002.05.28.png).