Version Control With Subversion Source

Add 'svnlook history', kinduvan orthogonal view of the filesystem to
that provided by 'svnlook tree [--show-ids]'.

* subversion/svnlook/main.c
(cmd_table): Add new 'history' subcommand.
(do_history, subcommand_history): New.

* subversion/doc/book/book/ch05.xml
Document the new 'svnlook history' subcommand.

* ch05.xml, ch08.xml: change 'archive' to 'list-unused-dblogs'.

In usage examples in the book, don't show the debugging messages that are
only produced when "svn" is built in "maintainer mode".

* doc/book/book/ch03.xml
* doc/book/book/ch08.xml
Remove lines of "svn" output that contain maintainer-mode error messages.

Write "URL" consistently in upper case, in the Book and in messages that
the user may see (mostly error messages and the output of "svn info").

* doc/book/book/appc.xml
* doc/book/book/ch04.xml
* doc/book/book/ch08.xml
* doc/translations/french/client.texi
* subversion/clients/cmdline/import-cmd.c
* subversion/clients/cmdline/info-cmd.c
* subversion/clients/cmdline/main.c
* subversion/include/svn_error_codes.h
* subversion/libsvn_client/checkout.c
* subversion/libsvn_client/commit_util.c
* subversion/libsvn_client/ls.c
* subversion/libsvn_client/prop_commands.c
* subversion/libsvn_ra_dav/props.c
* subversion/libsvn_wc/entries.c
* subversion/svnadmin/main.c
* subversion/svnlook/main.c
* subversion/tests/clients/cmdline/getopt_tests_data/svn_help_log_switch_stdout
Change "Url" and "url" to "URL" in user-visible strings.

Minor fixes to the book.

* doc/book/book/ch03.xml
Use consistent spacing in example shell prompts.
Fix name of option "--non-recursive".

* doc/book/book/ch08.xml
Fix use of "svn up" to "svn update". (From Larry Shatzer.)
Use <quote> instead of ""'s. (From Larry Shatzer.)
Use consistent spacing in example shell prompts.

* doc/book/TODO: add some extra notes.

Kill 'svnadmin createtxn'. Cruft today, gone tomorrow.

* subversion/svnadmin/main.c
(subcommand_createtxn): Buh-bye.
(cmd_table): Remove junk related to the 'createtxn' subcommand.

* subversion/tests/clients/cmdline/svnadmin_tests.py
(create_txn): Remove (there is no more 'createtxn').
(remove_txn): Remove (I dunno how to force the creation of a
dangling, uncommitted transaction).
(test_list): Lose references to removed tests.

* subversion/doc/book/book/ch05.xml
Try to get the svnadmin subcommands list back into sync with the app.

Applied patch by Vincent Lefèvre.

* doc/book/book/ch08.xml
Corrected grammar in the "Examples" section.

Improve the book Makefile so it updates when it should and doesn't when it
shouldn't. It was always updating book-html-chunk, and never updating the
embedded revision number.

* doc/book/Makefile
Re-check the output of "svnversion" every time, but only update version.xml
if the revision number has changed. (Previously version.xml was never
updated unless it had been deleted.)
Only rebuild book-html-chunk if it is older than its (main) source files.
(Previously it was re-built every time.)
The image files are now dependencies of most targets.

* doc/book/book/ch07.xml
Corrected grammar in the "Get the Source Code" section.