Version Control With Subversion Source

* index.pt_BR.html:
Announce that the translation team is recruiting a new volunteer translator.

Translation status update.

Added some instructions about how to modify already committed
remarks associated to committed data.

Added 'vendor' term

Revert the part of r2271 that matched a change that won't be in
Subversion until at least v1.4, because the book is still on v1.3.

* en/book/ch09.xml
(svn.ref.svn.c.help): Restore the "--version" and "--quiet" options.

nebiac suggestion accepted.

Mention that the options "--help", "-h" and "-?" are synonyms for "help".

* en/book/ch09.xml
(svn.ref.svn.c.help): Mention that there are option synonyms for "help".

Update the documentation of "help" and "--version" to add some missing
information and to match the changes made in Subversion trunk r20301 and
r20353 to handle "help" and "--version [--quiet]" as two distinct commands.

* en/book/ch09.xml
(svn.ref.svn.sw): Mention the "--quiet" variant of "--version".
(svn.ref.svn.c.help): Update the list of switches.

Book Spanish. Translated two paragraphs.

Fix a text-formatting style.

* en/book/ch09.xml
(svn.ref.properties): Remove "command" style from the title.