add parties.html

Add page that lists all parties.
Add ICFJ Bellagio theme

I’ve probably screwed lots of it up, but it seems to do a good enough
job for now.
Make Issue page look better
Add an "all issues" page

We link to it from the new header, so we should really create it :)

TODO: Make it sort better (possibly by # of aspects?)
Make the Parties page look better
Rename 'Green' to 'Green Party'
Better display for Independents
rebuild Issue pages
Script for comparing our scores with TWFY
Merge branch 'gh-pages' of https://github.com/tmtmtmtm/stancer into gh-pages