Include images linked from the spreadsheet

And a quick-fix to turn this:
<img width=300 src="https://cloud.githubusercontent.com/assets/55319/2783050/46653212-cb28-11e3-8e02-e6a71cba6e17.png">
into this:
<img width=300 src="https://cloud.githubusercontent.com/assets/55319/2783045/2b973f98-cb28-11e3-91de-2e324ea93e38.png">
which I think is better, but not perfect of course.