More work on 7.4
More work on 7.4
More work on 7.4
More work on 7.4
Finish first pass through 7.4
Add licensing information (CC0)
Merge pull request #1 from CdLbB/master

Small fixes of typos in W&W section 6.222 Exercise 5 and 6.
Start 7.5
Work on 7.5
Work on 7.5
Work on 7.5
Work on 7.5
Finish 7.5
Start 7.6
More work on 7.6
Minor latex typo in 6.221
More work on 7.6
Fetched Brian's Master to Update