Don't try to upgrade a group if there's no author
Move activity content tests to their own module
Tests for full data on actor, object, in reply to
Add the ensureProperty() method
Ensure properties before generating content
Expand inReplyTo property to help with content
Keep continue param through links
If user has not logged in, let them
Prefetch followers and lists
Merge remote-tracking branch 'upstream/master' into pump.jpope.org