Search improvements

I added host: decorators and changed the default search field (what
field is searched by undecorated words) to be the description.
Made the resulting VM more hands off

I added some code to the .wsgi to detect code changes and restart the
WSGI worker process. Also added the EnableSenfile Off directive so that
you can store and edit your code in a vagrant shared folder without
freaking out apache.

Small other improvements (like disable iptables).