Remove dedupe requirement

We never ended up using it. Would have been cool though!
Rename the models and associations

(untested)
Update schema in load_data.rb
Update backend to pull from Socrata and use correct models
Fix pulling data from Socrata

It appears to work now.
Add summary sheet parsing
Update scripts to work regardless of current directory
Update frontend to use new schema
Use summary table to populate homepage numbers
Add initial JS API for the frontend

GET /api/candidates
GET /api/party/:id (using the "id" from the candidate)
Merge pull request #51 from ted27/new_schema

New schema