More accurate in/active sorting on the report page

This querying is based at the school level, rather that site/sitedetail in
order to grab all districts

Some Districts may have active and inactive schools/sites and need to be listed
in both sections
get_schools: define active/inactive schools
report.js: Display schools w/o sites or sitedetails
get_schools: return active or inactive, not both
Merge pull request #15 from orvsd/report_better_district_sorting

Report: better district sorting