ctrl+v paste possibility

Now it is not possible to ctrl+v card number. We should permit users to paste card numbers with ctrl+v key combination
I'm not convinced that this condition should ever be reached.

The check for `e.ctrlKey` on [Line 247](https://github.com/sunnystas/jquery.payment/blob/patch-2/src/jquery.payment.coffee#L247) should `return true` before control ever reaches this statement.