Fix bug in user streams

https://twitter.com/rpluto/status/420851270292090880 /cc @rpluto
Alias T::Set#account to T::Set#active
Apply style rules to t.gemspec
Add T::CLI#followings_following
Add T::CLI#intersection
Remove premature optimization
Don't unnecessarily bind blocks
Don't unnecessarily bind blocks
Bump version to 2.2.1
Updating Zsh completion
Add T::CLI#followings_following
Add T::CLI#intersection
Remove premature optimization
Fix ambiguous first argument
Fixed merge conflicts