RDF and OWL test cases

I added some test cases concerned with RDF and owl.  I improvised a
little when writing the RDF graphs.  Let me know if its okay.

RDF:
http://www.w3.org/2005/rules/wiki/RDF_Combination_Constant_Equivalence
http://www.w3.org/2005/rules/wiki/RDF_Combination_Constant_Equivalence_Graph_Entailment

OWL DL:
http://www.w3.org/2005/rules/wiki/Annotation_Entailment
http://www.w3.org/2005/rules/wiki/Non-Annotation_Entailment
http://www.w3.org/2005/rules/wiki/Individual-Data_Separation_Inconsistency
http://www.w3.org/2005/rules/wiki/OWL_Combination_Vocabulary_Separation_Inconsistency
http://www.w3.org/2005/rules/wiki/OWL_Combination_Vocabulary_Separation_Inconsistency_II
-- 
Jos de Bruijn            debruijn@inf.unibz.it
+390471016224         http://www.debruijn.net/
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