Update collection method preferences
Add retweets_of_me command
Don't pluralize "seconds" if there is only 1 second remaining
Fix tests on Rubinius
Updating Zsh completion
Apply style rules to zsh.rake
Update style rules for RuboCop 0.17
Open a user's Twitter profile, not their website
Update twitter dependency to ~> 5.6
Bump version to 2.3.0