Candidate cycle dropdown should apply to statements, not candidates

[jmcarp]

Currently, selecting an election cycle on a candidate detail page (e.g. 2013-2014) sends a request to the API at /candidate/<candidate_id>?year=<year>. Then we request all financial statements associated with that candidate's committees--meaning we don't apply the election cycle filter to the statement listing. I may be interpreting this incorrectly, but I would think that we should be filtering the statements by year instead of the candidate. This will be possible once @LindsayYoung's new /reports and /totals endpoints are added, so that we can send a request to e.g. /reports?candidate_id=<candidate_id>&year=<year>.

We will want to fix this before re-enabling the cycle filter on the candidate detail page, which FEC has requested we fix soon.

[jmcarp]

Moved to https://github.com/18F/openFEC/issues/692.