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
Added time since tweet after username when viewing timeline and direct messages
The colour of the time is no longer yellow. The time now respects --relative-dates
merged conflicts