as you'v certainly noted, I'v checked in some 
nurbs code: it's basically a set of headers. The 
actual nurbs code is parametrized for the Point 
type and the number of parameters. A special 
'Vertex.hh' header is provided adding the needed 
API so all this can be instantiated for fresco's 
Vertex type.

the test/nurbs/ directory contains five examples
demonstrating its use. I checked in a Makefile.in,
which should be easy to either integrate into the
build system, or manually derive a Makefile from.
'make' will build five examples showing what can
be done with nurbs.

I'll try to work further on a Path API, so we can
come back to that discussion, too...