Add sort UI to admin/reports #220
Add reports search form #220

Adding reports search form to admin/reports pages. Searching by:
* Category
* Approved
* Verified
* Keyword
* Location
* Media type
* Mode (SMS/Web/Twitter)
* Date
Fix bug in election controller: missing instance of Input in election hook
Merge pull request #110 from rjmackay/admin-reports-search-sort

Port admin reports search/sorting function from core