removing revision strings in source code

[GoogleCodeExporter]

Right now all source files have a $revision$ string, from the days of CVS.
 Under subversion these don't make since, since the revision number is for
the whole system, not per-file, and modifying the file per-revision messes
up other things like diff detection anyway.

So these need to be removed.  However, since that would require modifying
thousands of files and the repository would then have space problems, we
should probably defer this until space isn't a problem anymore.

Original issue reported on code.google.com by [email protected] on 4 Nov 2006 at 11:22