Proper serving of static files

[rjmagley]

Currently, the state of the VF repo isn't 100% properly serving static files. The VF site is doing it properly due to some hacks we did to get it up ASAP, now it's time to fix them properly.

• [x] Implement the load static tag in all the templates so that they properly point at static files
• [x] Insure settings.py is appropriately set up to handle static files
• [x] Update the INSTALL.md instructions to mention how to collect them - the end user is responsible for deciding how to serve them up

After we make sure this all works on the beta server we can get it set up on the main server and make any tweaks needed there.

[rjmagley]

I think I got it all together here.