Writing area

https://trello.com/c/NElTBCxh/54-as-a-user-i-want-a-nice-place-to-write-things

![selection_034](https://cloud.githubusercontent.com/assets/8248100/5289749/cf72cf74-7b0e-11e4-91dd-73e344803606.png)

I would pull this out of application.js and move it into a separate js file, just to keep application.js clean.