Akihiko Odaki authored Jul 18, 2017 and Eugen Rochko committed Jul 18, 2017

* Wrap methods of ProcessFeedService::ProcessEntry in classes

This is a change same with 425acecf, except
that it has the following changes:

* Revert irrelevant change in find_or_create_conversation
* Fix error handling for RemoteActivity

* Introduce Ostatus name space