These all correspond to GitHub issues for method additions from sferik.
Add the Twitter#retweets method.
Add the Twitter#friends method.
Add the Twitter#followers method.
Add the Twitter#tos and #privacy methods.
Add the authenticated friendships_outgoing method.
Add the authenticated list_add_members method.
Add the authenticated is_subscriber? method and cleaned up the is_lis…
Add the authenticated block_exists? method.
This is awesome. When I created all these issues, I was secretly hoping I wasn't going to have to implement them all myself. :)