Regenerate gemspec for version 0.3.0
Regenerate gemspec for version 0.3.0

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