Start widget.

Conflicts:
	bill/views.py
Consolidate boxes, remove unnecessary code, and make the widget fit its container as best it can.
Add title and logo, make links open in a new browsing context, and improve styling.
Merge branch 'bill-widget' of https://github.com/govtrack/govtrack.us-web into bill-widget
Merge branch 'bill-widget' of https://github.com/govtrack/govtrack.us-web into bill-widget