14 brainstorms v2

So, first off, completely blanking on who I was working with last week. I'll take the blame for any errors with this, but the success was a group effort.

This change adds the idea of a Project. An idea belongs to a project, a project has many ideas. Right now we display the associated project on the home page, if there is one:

![winnivote 2014-03-16 21-45-09 2014-03-16 21-45-45](https://f.cloud.github.com/assets/221368/2432998/3edff47c-ad7e-11e3-8ad7-59cc44e9eb6f.jpg)

There's also a pulldown in the new project view to assign a project, but it's too ugly to show.