TurtleParser.hs: implemented a first cut at handling of collections of objects.
TurtleParser.hs: implemented a first cut at handling of collections of objects.

darcs-hash:20071018090706-db1bb-9669336624e0f64649a75836c3e69828ea9017c0

LeifW/rdf4h,jutaro/rdf4h,cordawyn/rdf4h,ddssff/rdf4h