Update jquery.creditCardValidator.js

Added support for pld VISA cards that have 13 digits.
Added card type DISCOVER, DINNERSCLUB and JCB

I have added validation for DISCOVER, DINNERSCLUB and JCB type of cards
Update jquery.creditCardValidator.min.js

Added new Card types for minified version
Merge pull request #1 from imdad/master

I have added DISCOVER,DINNERSCLUB and JCB