Version Control With Subversion Source

* ch04: clarify misstatement in vendor branching discussion, see issue #33.

* ch06: stop mentioning Neon over and over, keep it vague-er.

Add reference to the SQLite homepage.

Fix some broken markup.

Add a note about SQLite (and how we don't have much else to say about it).

Add some placeholders for undocumented runtime configuration options.

Various smallish fixes for chapter 5.

Finish my tasks for book drop.

* src/en/book/ch06-server-configuration.xml: finish webdav-proxy stuff.

* src/en/book/ch05-repository-admin.xml: tweak output of 'svnsync sync'.

Add sections 'Moving and Removing Repositories' and 'Managing
Repository UUIDs', and update some overlapping text with the
appropriate cross-references.

Dizionario-IT-EN.cliplibrary:
replaced:
open source=| with: open-source=|
and:
subversion client=client subversion with: subversion-client=client subversion