A start at updating the documentation

I'd like to help update the documentation, and this is a start.

* I've added a section about the content management system
* started working on a page about creating an example project (the repo pointed to isn't up to date, so I don't know when this section should be added/extended)

I would like to see a few more sections -- one would be written for users who are managing a conference. It would be a guide through typical scenarios.