Version Control With Subversion Source

* src/en/book/ch03-advanced-topics.xml
(svn.advanced.props.special.keywords): Document the $Header$ keyword.
While here, use example.com in an example URL, instead of using a real URL.
Fixes issue #95.

Patch by: Andreas Stieger <andreas.stieger@...>

Finish issue #76 ("Documentation of historical URI feature").

* src/en/book/ch06-server-configuration.xml
Document the (expanded in 1.6) mod_dav_svn repository browsing
feature.

Patch by: Andreas Stieger <andreas.stieger@...>
(Heavily tweaked by me.)

* src/en/book/ch02-basic-usage.xml
Mention long-form option aliases, and add a couple more index entries.

* src/en/book/ch01-fundamental-concepts.xml
Oops, fix the secondary indexterm for some subcommands to merge into
other similar terms as intended.

* src/en/book/ch03-advanced-topics.xml
* src/en/book/ch01-fundamental-concepts.xml
* src/en/book/ch00-preface.xml
Mostly index entry additions. Some minor wording and formatting changes.

Bump the copyright, the sequel.

* src/en/book/ch00-preface.xml
My first pass at bringing this up to speed with Subversion 1.6.
Also included in this change is some sectional reordering (to match
the order O'Reilly's editors deemed most appropriate for the second
edition of the printed work.)

Bump the copyright.

* trunk/src/de/book/ch03-advanced-topics.xml:
- Fixed ticket #136 (cf. http://www.svnbook.de/ticket/136).

I was surprised this morning to learn that a new book, "Subversion
1.6", written by Sussman/Fitzpatrick/Pilato, has hit the market. Yep,
ISBN 9781596821699[1]. Which is odd, because I'm fairly certain that
we haven't finished updating this book for 1.6 coverage. Anyway, this
commit takes some steps to try to point out the DRAFT-ful nature of
the current text.

[1] http://isbn.nu/9781596821699

* src/en/stylesheets/custom-fo-stylesheet.xsl
New custom stylesheet which marks this version as a draft.

* src/en/stylesheets/fo-stylesheet.xsl
Include the new custom stylesheet. Not strictly necessary to have
this abstraction, but it makes all the custom stuff easy to find.

* src/en/stylesheets/custom-html-stylesheet.xsl
Make this version as a draft.

* src/en/book/book.xml
Add '[DRAFT]' to the title of the book.