Pass data from Hello to Contribute page

Link the Hello and Contribute pages together via
an 'activeContribution' service. In other words,
now the credit-card processing page has the data
it needs.
Improve UX for card and exp entry

Make the form for entering the credit card number
and the expiration date a little better, by aligning
things and using drop-downs for the date. (Amazon,
who has probably tested card entry more than me,
uses drop-downs for the date.)