Fix stats logging (bug 1093699)
Merge pull request #370 from magopian/1093699-fix-stats-logging

Fix stats logging (bug 1093699)
Fix applications-versions.json (bug 1102977)
Merge pull request #371 from magopian/1102977-applications-versions-json

Fix the application_versions.json view (bug 1102977)
fix test following d189c434c4 (bug 1102977)
files.utils logger ~> z.files.utils
Bug 1075998 - Use soft deletion for add-on reviews, and allow admins to restore them.