Add rdoc and sort
Add rdoc and sort

firmanm/impressionist,charlotte-ruby/impressionist,charlotte-ruby/impressionist,firmanm/impressionist,firmanm/impressionist,samchen2009/impressionist,guodongme/impressionist,charlotte-ruby/impressionist,samchen2009/impressionist,guodongme/impressionist,guodongme/impressionist,samchen2009/impressionist