README image links are failing

[kanzure]

Unfortunately, the nanoengineer-1.net site has gone offline. As a result, the images hotlinked in the README are failing. GitHub CDN (akamai) seems to have most of these images, except for three.

[kanzure]

I have recovered some of the images here:

http://diyhpl.us/~bryan/irc/nanoengineer/images/

However, the filenames will probably change to something more consistent.

[kanzure]

The three missing images are:

• the worm drive
• the sorting pump
• the universal joint (not the screenshot)