Version Control With Subversion Source

* doc/book/book/ch00.xml
Add Martin Further, Robert P. J. Day, and Steffen Prohaska to the
contributors list.

* doc/book/book/ch01.xml
Lose the <firstterm> tags around meritocracy.

* doc/book/book/ch04.xml
Fix uses of short subcommand names. Also, add log message to
"Resurrecting Deleted Items" example. Patches by Francois
Beausoleil <fbos@...>.

Also, clear up some confusing command examples.

* doc/book/book/ch07.xml
Fixup the vendor branch examples. Patch by Steffen Prohaska
<prohaska@...>.