Important updates! Read extended commit for details.

I've updated the models -- so you will need to perform a migration. To do so, do the following:
```
./manage.py makemigrations app
./manage.py migrate
```
Let me know if you have problems.

Other changes in this merge include:
* Added our static content to the database! To import this, run `./manage.py loaddata app/fixtures/db.json`.
* Added html2text to our requirements.txt. It's unlikely you will need to install this.
* Some haphazard attempts at writing markdown extensions -- will make these more legitimate later this week as I master regular expressions...