Model and track party votes

[michaelmulley]

Alas, free will is not often evident in the House: while votes are conducted on the individual level, they are virtually always conducted along party lines. Acknowledge this, track how each party voted on a given bill, and label votes against party line. (Howdtheyvote does this already.)

[michaelmulley]

(Mostly done, but there needs to be a page which lists dissenting votes.)