Import resize.sh from stagestosaturn.git
Make resize.sh work for any file extension (not just .jpg)
Use resize.sh in Makefile
Add support for PNG images
Add support for .size files in resize.sh
Merge epubbase

Conflicts:
	resize.sh
Fix probable typos
Add a better image of the Apollo 6 photograph from orbit

http://spaceflight.nasa.gov/gallery/images/apollo/apollo6/html/as06-02-1436.html