Merge branch 'gh111+112-Reports' into staging
Update gems
Add statistics index page.
Tidy up OSM Permissions page.
Fix undefined method [] when running warded badges report
Fix adventure badges in missing badge requirements report.
Update osm gem.
Update gems
Update osm gem
Update gems
Allow limiting of missing badge requirements report to certain badge types. closes #118
Tidy up exports
Add exporting of flexi records. closes #119
Update gems
Move activity badge warnings for reports.
Make exports controller DRYer
Default exports to have header row
Store current_section as an ID not a Section in the session.
Fix email reminders getting permissions from current section not section for the reminder. closes #120
Fix "undefined method 'id' for nil:NilClass" when getting name for a checked term (which was deleted in OSM). Issue #121 is for a more robust fix.