TriplesGraph_Test.hs: added tests for select function.
TriplesGraph_Test.hs: added tests for select function.

darcs-hash:20071006182735-db1bb-162f7332ff3f6e7f21092a48684529b203ee84fb

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