added site_setting to control the default new_topic_duration_minutes
added 10 minutes option for auto_track_topics_after_msecs, default bumped up to 5 mins
Collapse user actions in UI so it stops looking crazy
Removed dud dupe user action TOPIC_RESPONSE
Always show the owner of a post on the user page, actions by others at the bottom
Several migrations were failing when running db:migrate at the initial release version from an empty database.
These changes took out statements that were causing migrations to fail, usually because of references to models that no longer exist.
