Version Control With Subversion Source

* www/bin/build-and-deploy.conf
Now build the 1.7/en branch for the English 1.7 version. Also,
build only the html-chunk format for nightlies now as that's the
only version that will carry the admonishment about incompleteness.

* www/index.en.html
Add links to the 1.7 versions, and remove links to nightlies save
for the html-chunk version.

Merge from ^/trunk/en r4192 and r4193.

Merge from ^/trunk/en r4202.

* en/book/ch01-fundamental-concepts.xml
Complete a TODO item I'd overlooked -- another limitation of
mixed-revision working copies.

* en/book/book.xml,
* en/book/ch00-preface.xml
Refer to 1.8 as the doc target now, not 1.7.

* en/book/styles.css
* en/stylesheets/custom-html-stylesheet.xsl
Add a custom header that warns readers about the in-between-ness of
this (trunk) version of the book.

Create the English 1.7 maintenance branch.

Create 1.7 version placeholder directory.

Edited wiki page SvnBook17Status through web user interface.

Edited wiki page SvnBook17Status through web user interface.