Build script relies on svnant, which is not compatible with subversion 1.5 working copies

The current build.xml ant script uses svnant to obtain the latest revision number from the repo, however svnant is not compatible with subversion 1.5 (http://subversion.tigris.org/svn_1.5_releasenotes.html), and so the build fails with working copies checked out by this version. The build fails with "this version of subversion is too old, please get a newer version..." This will become more apparent as svn 1.5 trickles out; I'm using a brand new dev environment with both subclipse 1.4 and svn 1.5 client, so I got bit rather quickly.

Those with svn 1.5 can get the code from the trunk, but cannot do an ant build.

svnant hasn't been updated in more than a year and appears to be dead, so it may no longer be a viable tool for the ant build.