6cec0b0 - Author, Version in byline.
b2e152f - pygments style
2cccce7 - move preamble to separate file
47e2ea9 - make the pdf output look reasonable
5ff556c - the very complicated py3k upgrade.
d13450c - add stage 5.
02d7bd1 - remove spaces from world.json
7a29ae0 - expound stage 4 a bit.
72aef03 - add link to PyMOTW for json
350188c - add an example for a direction which doesn't exist.
3da422d - remove east dungeon exit
519c9f4 - fix up line breaking for stage 1
8d4bbf5 - use the pyramid theme, fix a stupid
868fabb - Remove the part about wrapping the dictionary, since it’s no longer just the
667a204 - expand out stage 3