Feature/new datamodel

I modified the home page template to use bootstrap's carousel. To get the full effect of the carousel I upgraded us to bootstrap 2.3.2. We were on bootstrap 2.2.2. [There don't seem to be any incompatible changes from 2.2 to 2.3](http://blog.getbootstrap.com/2013/02/07/bootstrap-2-3-released/) so I hope this won't be an issue.