Originally created by Phil Matthews [http://www.thewebdesignblog.co.uk/] almost 5 years ago, this set [http://www.smashingmagazine.com/2010/10/21/free-png-credit-card-debit-card-and-payment-icons-set-18-icons/] of payment icons is still my favourite: I needed a 'bitcoin' payment icon to match this set for a project I'm working on, so decided to…