Version Control With Subversion Source

Clarify explanation of top-down vs. bottom-up learning.

* src/en/book/ch00-preface.xml
(svn.preface.howread): Add paragraph about top-down vs. bottom-up
learning. I'm tired of talking about this subject with in every
conversation I have with people about our book. I think it's useful
meta-philosophy.. :-)

* src/en/book/appa-quickstart.xml
(svn.intro): Remove terminology from here, now that it's mentioned
in the Preface. Simplify the appendix introduction, wrap the 2nd
paragraph in a <warning>, so impatient people actually see it.

Remove no-longer-necessary TODO file. We'll use Trac from now on.

* it/book/ch07.xml
Fix a slew of entity syntax errors and tag omissions. I can build the
IT translation as PDF now.

Fix all instances of '&mdash ' to be the well-formed '—'.

update to line referring cap. 7

saved using UTF-8

new contribution from Miky

* src/ru/book/ch-server-configuration.xml, src/ru/book/foreword.xml: Merged
r2628, r2629, r2630

Revision of Ch09 until svn.ref.svn.c.commit exluded.

Fix book bug pointed out by Auke Jilderda <auke@...>.

* src/en/book/ch03-advanced-topics.xml: Fix incorrect binary file
conflict handling description.