[WIP] Tito button

- [x] Add the button back
- [x] Deploy WIP site http://rubyconf15wip.herokuapp.com/
- [x] Check out Safari 422 errors
- [x] Fix click-before-loaded Tito bug
- [x] SHIP IT

@pat @paulca I added you as collabs to the Heroku app and here.

```shell
# Add the WIP heroku app
git remote add heroku-tito-wip git@heroku.com:rubyconf15wip.git
# Deploy
git push heroku-tito-wip tito-button:master
```