Version Control With Subversion Source

Apparently at the moment only 'svn:' properties are UTF8 encoded, both
as revision properties and as normal file properties. So talking about
being able to put binaries in Subversion properties is quite okay. So
my concerns were not necessary.

* doc/book/REVIEW: Removed entry.

Change the color of visited links in the stylesheet for the book to make them
distinguishable from unvisited links.

Patch by Ariel Arjona (ariel@...)

* doc/book/book/styles.css: Tweak.

Whoops. Merged is G, not M. Thanks to Ryan Barrett <svnbook@...>
for pointing this out.

* doc/book/book/ch09.xml: Fix error.

Some more book changes.

* doc/book/book/ch07.xml
Note that the Application Data directory is usually hidden.

* doc/book/book/ch06.xml
Document $SVN_SSH.

Fix the </screen> tag so that "screen" sections don't end in
whitespaceful lines.

* doc/book/HACKING
Adjust description of the proper use of the </screen> tag.

* doc/book/book/appa.xml
* doc/book/book/appb.xml
* doc/book/book/ch03.xml
* doc/book/book/ch09.xml
Adhere to the updated HACKING guidelines with respect to the </screen> tag.

Knock out a bunch of REVIEW tasks.

* doc/book/REVIEW
* doc/book/book/appa.xml
* doc/book/book/ch03.xml
* doc/book/book/ch05.xml
* doc/book/book/ch07.xml
* doc/book/book/ch08.xml
* doc/book/book/ch09.xml

Fix non-uses of <quote>, fix spaces around &mash;, and a bunch of
other little technical stuffs like that.

* doc/book/book/appa.xml
* doc/book/book/appe.xml
* doc/book/book/foreword.xml
* doc/book/book/ch00.xml
* doc/book/book/ch01.xml
* doc/book/book/ch02.xml
* doc/book/book/ch03.xml
* doc/book/book/ch04.xml
* doc/book/book/ch05.xml
* doc/book/book/ch06.xml
* doc/book/book/ch07.xml
* doc/book/book/ch08.xml
* doc/book/book/ch09.xml

Zap stray spaces before and after —

* doc/book/book/ch00.xml: Update markup.
* doc/book/book/ch04.xml: Update markup.
* doc/book/REVIEW: Update note.

Update TODO and REVIEW as I knock items out.

* doc/book/TODO: Update.

* doc/book/REVIEW: Update.

Update diff examples to the 'new' internal diff code output. Since
the diff of this change is a diff of diff output, be careful looking
at the actual diff as it may cause your eyes to melt.

* doc/book/book/ch03.xml: Update diff examples.