Version Control With Subversion Source

* COMMITTERS: Change username 'waldemar' to 'roberti' to reflect the actual
username in the password file.
(EMERITUS COMMITTERS): Make a new section and list those people whose
usernames appear in the repository history but not in the password file.

* www/index.en.html
(Online Versions of the Book): Point to the Trac browser instead of the
mod_dav_svn default view for the book sources.
(Feedback/Contributing): Rework this section to include a link to our
issue tracker.

Add section for 1.2 versions, and bump the nightly section to refer to 1.3.

Add placeholder for 1.2 renderings.

* src/en/book/book.xml,
* src/en/book/ch00.xml
Bump the book's target version: s/1.2/1.3/

Initialize the Italian translation branch from the 1.2 English version.

Tag the 1.2 version of the English book.

* src/en/book/ch03.xml
(What's in a Name?): Remove the use of an article before a cross-reference,
as the output system adds that for us.

* src/en/book/ch03.xml
(What's in a Name?): Tweak broken text which made claims about
Subversion's handling of file contents and use of UTF-8 which were
at best confusing, at worst just plain wrong.

Book Spanish. Documented binding and extended meaning linking with
the older wrapper term.