* add annotate to Gemfile
* rails g annotate:install
* configure annotate_models
* add schema info to models
* fix rubocop to add frozen_string_literal
Filters out hidden stream entries from Atom feed
Blocks now generate hidden stream entries, can be used to federate blocks
Private statuses cannot be reblogged (generates generic 422 error for now)
POST /api/v1/statuses now takes visibility=(public|unlisted|private) param instead of unlisted boolean
Statuses JSON now contains visibility=(public|unlisted|private) field