Version Control With Subversion Source

* ch04-branching-and-merging.xml: remove extra pegrev from third --reintegrate example.

A billion little corrections from Jens Seidel <jensseidel@...>.

* ch04-branching-and-merging.xml: more correctionst from Daniel Shahaf <d.s@...>.

* ch04-branching-and-merging.xml: some suggestions from Daniel Shahaf <d.s@...>.

* ch04-branching-and-merging.xml: some corrections from Stefan Sperling <stsp@...>.

* ch06-server-configuration.xml: fix svn.conf filename, pointed out by Eric Gillespie <epg@...>.

* ch01-fundamental-concepts.xml: some suggestions from Karl Heinz Marbaise <khmarbaise@...>.

Tweak comments in diffwrap.sh and diffwrap.bat examples.

* src/de/book/ch02-basic-usage.xml
- Fixed nightly build failure
typo in closing tag

* src/de/book/ch02-basic-usage.xml
- Fixed #48 - #55
Patch of Jens M. Felderhoff