* doc/book/book/images/ch02dia2.png
* doc/book/book/images/ch02dia3.png
* doc/book/book/images/ch04dia1.png
* doc/book/book/images/ch04dia2.png
* doc/book/book/images/ch02dia4.png
* doc/book/book/images/ch02dia5.png
* doc/book/book/images/ch04dia3.png
* doc/book/book/images/ch02dia6.png
* doc/book/book/images/ch04dia4.png
* doc/book/book/images/ch02dia7.png
* doc/book/book/images/branches.ppt
* doc/book/book/images/VersioningModels.ppt
* doc/book/book/images/ch02dia1.png
Change "Joe" and "Jane" to "Harry" and "Sally". Remove the colors, and
fix "prime" indicators (ala A') to not have the smart-quotes characters.
* doc/book/book/images/ch05dia1.png
* doc/book/book/images/ch05dia2.png
Remove these no-longer-used diagrams.
