Update daily_parse_video for Rails 4
Add video import to update:all

Videos will now be imported on a daily basis.
removed overriding formageddon classes and fix pdfkit gem
fixed pdfkit gem
Merge pull request #477 from sunlightlabs/formageddon-fixes

Formageddon fixes
corrected votes_with_party calculation queries and cache them in person_stats. Each congress now has its own model NthCongress (because the Congress API gem claimed the namespace 'Congress'). Other odds and ends