Version Control With Subversion Source

and rephrase libsvn_delta and libsvn_ra_svn descriptions.
Update 'svn --version' <screen> section.
Say '<Location> directive' not 'Location directive', when referring to the
Apache <Location> container directive.
Plurality typo fix: Subversion has more than one datatype!
Update 'svn checkout' <screen> section.
Update references to 'HACKING' to 'www/hacking.html'.