Reports refactor

- Removed debug statement
- Refactored reports to use a crosstab url builder, cuts down on cruft
  and automatically adds in market and site filters
- Market and status filters not currently functional.
Merge remote-tracking branch 'upstream/master'
Miscellenous improvements.

- Review Next button will now save the current repsondent and move on to
  the next newest one.
- Small refactor for a crosstab report.
- Re-arranged the sidenav as per #221.
Conditionally show 'review next' if there is a next to review.
Merge remote-tracking branch 'upstream/master'