How to fit Raspbian Jessie onto a 4 Gig card

Inspiration for this tutorial comes from Richard Hayler. Without it, I would have had no clue what to do. Thank you Richard!
http://richardhayler.blogspot.ca/2015/10/squeezing-raspbian-jessie-on-to-4gb-sd.html

You will need to start with three cards:

1. the target 4Gig,
2. the origin 8Gig card
3. and an intermediate 16Gig card.