rooibos/data admin.py enhancements 

I had to work on a few different things with our data at Temple and over time wanted a little more out of the admin section (mostly to be able to sort the various listings) - and I figured I'd share the enhancements since they're convenient. It's all fairly vanilla, just convenience stuff - rooibos.data.models not touched. 

Screenshots below are from my local laptop test deployment, so the actual field data is a little all over the place

![rooibos_admin_data_fields](https://f.cloud.github.com/assets/320464/1979068/e21aebca-83ac-11e3-9d82-b91144909899.png)

![rooibos_admin_data_records](https://f.cloud.github.com/assets/320464/1979070/e7f4307e-83ac-11e3-9b20-13844d82ebde.png)

Also, I added the pycharm IDE files to .gitignore. =)