- added new Discover 65 prefix

- added new Discover 65 prefix
- check for Switch before Visa as Switch has some BINs in ^4
  - accept masked numbers in cardtype()
  - add handling of card network peering arrangements, controllable via
    $Business::CreditCard::Country
- identify Diner's club ^36 cards as MasterCard in US and Canada
  - identify China Union Pay cards as Discover cards outside China
  - identify China Union Pay cards

and... 0.30!