Version Control With Subversion Source

Tweak chapter 5 txn-cleanup stuff.

* src/en/book/ch05.xml (Repository cleanup):
Don't say that zombie txns 'consume resources'; be less alarmist.
Don't mention that dead-txns can result from failed updates; they can't.

* src/en/TODO: remove item.

Re-org docs on how URLs are parsed.

* src/en/book/ch02.xml (Repository Access URLs): shrink sidebar to
just a table of URL schemes, with a link to new ch07 section.

* src/en/book/ch07.xml (URL Construction): new section; absorb the
text from the ch02 sidebar and also mention URL autoescaping.

* src/en/book/TODO: remove TO-DO.

Tweak beginning of chapter 8 to mention FSFS. Very small change.

* src/en/book/ch08.xml
(Repository Layer): mention BDB and FSFS both.
(A Brief Inventory of the Subversion Libraries):
list libsvn_fs_base and libsvn_fs_fs in table of libraries.

* src/en/book/TODO: remove item.

Document subversion's use of locale.

* src/en/book/ch07.xml: new "Localization" section.

* src/en/book/TODO: remove item.

Book Spanish. Translated two paragraphs.

Book Spanish. Translated two paragraphs.

* src/en/TODO: better explain strategy for URL docs.

Tweake appendix C in the 1.2 book branch.

* src/en/book/appc.xml: left-justify <screen> contents.

* src/en/TODO: tweak to reflect that the Appendix C rewrite is finished.

* en/TODO: New 1.1 item.

Standardize on "/usr/bin" as the example location of Subversion binaries.

* en/book/ch05.xml (txn-info.sh): This example script is intended for
interactive use, so just remove the absolute paths to svnadmin and svnlook,
and let $PATH do its thing.

* en/book/ch06.xml: Change existing example binary locations to "/usr/bin".