Fix bit-rotted OS X build.

Last time I touched this, it was trying to build for PowerPC/x86
agnostic MacOS 10.3, and these days, x86-only 10.4 is the thing. Also,
[NSString stringWithCString:] is obsolete, so move to its replacement
[NSString stringWithUTF8String:].


git-svn-id: svn://svn.tartarus.org/sgt@10256 cda61777-01e9-0310-a592-d414129be87e
Switch to a non-SVN-dependent versioning scheme.


git-svn-id: svn://svn.tartarus.org/sgt@10257 cda61777-01e9-0310-a592-d414129be87e
Remove dependency on Subversion keyword substitution.

\versionid is now added to the docs by the build script.


git-svn-id: svn://svn.tartarus.org/sgt@10258 cda61777-01e9-0310-a592-d414129be87e