Version Control With Subversion Source

* doc/book/TODO
* doc/book/book/ch00.xml
* doc/book/book/ch01.xml
* doc/book/book/ch02.xml
* doc/book/book/ch04.xml:

Incorporate some book changes from a review.

Use an error-checking example consistent with Subversion code.

* doc/book/book/ch05.xml
* doc/book/book/ch06.xml
* doc/book/book/ch07.xml
Make some fixes recommended by Garrett Rooney. Leave some TODOs as
well.

Finish issue #959 - svn:externals should cooperate with 'svn status'

* subversion/include/svn_wc.h
Re-order some stuff for dependency's sake.
(svn_wc_status_external): New.
(svn_wc_statuses): Add 'traversal_info' paramater.

* subversion/libsvn_client/client.h
* subversion/libsvn_client/externals.c
(svn_client__recognize_externals): New.

* subversion/libsvn_wc/status.c
(get_dir_status): Add 'traversal_info' parameter, and populate that
sucker when the opportunity presents itself.
(svn_wc_statuses): Add 'traversal_info' paramater. Update call to
get_dir_status().

* subversion/libsvn_client/delete.c
(svn_client__can_delete): Update call to svn_wc_statuses().

* subversion/libsvn_client/status.c
(svn_client_status): Update call to svn_wc_statuses(), passing a
traversal info structure. Then, use the new
svn_client__recognize_externals() function to fixup the status hash.

* subversion/clients/cmdline/status.c
(generate_status_code): Return 'X' for svn_wc_status_external.

* subversion/clients/cmdline/main.c
(svn_cl__cmd_table): Document the new 'X' for status output.

* subversion/doc/book/book/appa.xml
* subversion/doc/book/book/ch03.xml
Document the new 'X' status indicator.

Begin incorporating comments from Garrett Rooney's Most Excellent
Technical Adventure, umm, err, Review.

* doc/book/book/ch03.xml, doc/book/book/ch08.xml: Incorporate comments
from review.

* doc/book/TODO: reorganize book-work a bit.

* doc/book/book/appe.xml: fix URL for jsvn, at David Golpira's request.

* ch02.xml: book tweak, add svn+ssh:// to chapter 2 table.

* book/ch05.xml, TODO: fix typo, add more TODO items

Fix a few "svn import" examples in the book to use the syntax introduced in
rev 6288. Thanks to Mark Proctor <m.proctor@...> for noticing.

Note: svnbook.red-bean.com is at r6204:6215.

* doc/book/book/appc.xml
(Problems using Subversion): fix a few import examples.