added Twitter handles for Vitter, Gillibrand, Franken, Klobuchar, Ayotte...

..., Cassidy, Rohrabacher

http://www.twitter.com/kellyayotte
https://twitter.com/amyklobuchar
https://twitter.com/SenGillibrand
https://twitter.com/alfranken
https://twitter.com/BillCassidy
https://twitter.com/DanaRohrabacher
https://twitter.com/DavidVitter