Version Control With Subversion Source

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn propget" (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn propedit" (cf.
http://www.svnbook.de/report/6).

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn propdel" (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn move" (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn mkdir" (cf. http://www.svnbook.de/report/6).

* trunk/src/de/book/ch09-reference.xml
- Ticket #262 command "svn mergeinfo" (cf.
http://www.svnbook.de/report/6).
- Edited examples of patch r3565 by cmpilato for version 1.5 where
carets were not yet available for specifying URLs.

* src/en/book/ch09-reference.xml
Correct outdated example of 'svn mergeinfo' output.

Found by: Karl Heinz Marbaise

* src/en/book/ch03-advanced-topics.xml
Add a note (a warning, really, but not so harsh) about not presuming the
existence of any revision properties.

* src/en/book/ch03-advanced-topics.xml
(svn.advanced.externals): As usual, uber-feedback by cmpilato.
Typos, wording fixes, you name it. He shoots them all down!

* src/en/book/ch03-advanced-topics.xml
(svn.advanced.externals): Fix a revision number glitch in
the example output, and simply say "external" instead of
"file external" where the context prevents ambiguity.