refactors context binding from _this to self
remove problem spec that does not work properly in rails 4 mode into application controller and correct it
add logic that auto closes any topics that missed the queued job (due to redis flush or whatever)
correct logic for tracking incoming links
very bad idea to remove glyphs from privat / deleted and read restricted topics
FIX: in Rails 4, ActiveRecord::Base.descendants includes ActiveRecord::SchemaMigration for some reason. Exclude it from export.
Add an order for user_stats table in exporter
Minor typo fix in INSTALL-ubuntu.md.
Refactor Users#upload_avatar method

Moved avatar file upload to ```AvatarUploadService``` class and
```AvatarUploadPolicy```

Address review comments + require missing file in spec
Change admin display-row css so that multiple lines can fit in the control column. Don't hard-code a height on the rows.
Some topic list re-organization.