Version Control With Subversion Source

Merge from ^/trunk/en r4364 (don't say commit can't carry arbitrary revprops).

Merge from ^/trunk/en r4364 (don't say commit can't carry arbitrary revprops).

Finish issue 141 ("ch05: Revisit the truth of a statement about
commits of custom properties").

* en/book/ch05-repository-admin.xml
(svn.reposadmin.maint.replication.svnsync): Tweak a paragraph to not
claim that Subversion can't propogate arbitrary revprops during
commit time. It actually can.

* en/book/book.xml
Add 2013 to the copyright years.

* en/book/ch04-branching-and-merging.xml
(svn.advanced.vendorbr.mirrored-sources): Add a hint about using
'svn add --force --no-ignore --no-auto-props' to pick up any new
files introduced in the next vendor drop.

Finish issue 182 ("ch04: Rework vendor branch section. Entirely.")

* en/book/ch04-branching-and-merging.xml
(svn.advanced.vendorbr): Completely rework this section and its subsections.

* en/book/ch09-reference.xml
(svn.ref.svn.sw.reintegrate): Mark as deprecated and fix the
misleading description of what this option was used for.

* en/book/ch04-branching-and-merging.xml:
Chapter-wide tweaks to reflect the fact the the current
release will be 1.8, not 1.7, when this version of the
book is branched.

* en/book/ch09-reference.xml
(svn.ref.svn.c.merge): Update 'svn merge' reference to
correspond to 1.8 behavior.

* en/book/ch09-reference.xml
(svn.ref.svn.c.mergeinfo): Update 'svn mergeinfo' reference to
correspond to 1.8 behavior.