[Ur] problems building Ur/Web on OS X since the change to dynamic so libs

[Georg Bauer]

> I don't know anything about the OSX development environment.  I'll be happy
> to accept any patch someone provides.

I think the right way to go would be to use GNU libtool - and go the
full automake+autoconf route, dynamic libraries for all supported
plattforms are an automatic result. But please don't look at me on how
to use libtool - that stuff allways drives me crazy ;)

bye, Georg