Update 2013-07-19 meetup notes & README.md

- [x] Update 2013-07-19 meetup event page notes with basically what happened (while I was present)
- [x] Add meeting time info to the repository README.md
- [x] Add obligatory bling to the README.md
- [x] Fix CSS styles to work well with Gist
- [x] --Fix--Workaround embedded Gist cutting off content below it