Version Control With Subversion Source

Fix typo.

* /trunk/doc/book/book/ch06.xml: Fix typo.

Changes from the meeting on Sunday. Stopped at svn export.

* /trunk/doc/book/book/ch08.xml: Incorporate edits from review.

Fix "svn commit --force" example to actually specify "--force". We
have Julian Foad <julianfoad@...> to thank for this.

* doc/book/book/ch08.xml
Specify "--force" in the example use of "--force".

Spelling fix (issue 1123), noticed by the sharp eyes of Andriy Palamarchuk.

* doc/book/book/ch01.xml
Spell "System" correctly.

The great markup sweep. This sorta kinda seems to be what the tools
guys at ORA told me, but I think that they didn't understand what I
really wanted to do. In any case, this does parse, but I believe I'm
going to have to do more monkeying around with this at a later date.
But for our weekend review, it should be just fine. There are still a
number of TODOs, and a couple of sections left to markup.

* /trunk/doc/book/book/ch08.xml: Markup all the subcommand stuff.
Ready for Saturday's review session, Mike and Ben.

Fix validation errors.

* /trunk/doc/book/book/appa.xml: Validation fix-ups.

Remove sections that we're omitting for the moment.

* /trunk/doc/book/book/ch08.xml: Slash and burn.

* ch00.xml, ch01.xml, appa.xml: add new book material. First drafts
of Preface (ch00) and Chapter 1 are ready for initial review, but
not yet Appendix A.

Chapter 6: "modules" -> "externals definitions"

Chapter 6: On How Modules "Do They Thang"