* [OAEI,NEW] Added oaei_alignment/3 for checking/generating alignments in the given graph. This is also used internally by oaei_check_alignment.
* [RDF_STATISTICS,NEW] Added count_subjects/3 for counding the number of subject terms that have a given number of predicte/object-pairs. The triples can belong to a given list of graphs.
* [RDF_STATISTICS,EXT] The graph argument for count_subjects/4 can now be a list of graphs.