Moved non-I/O-related functionlity of org.openrdf.query.resultio.QueryResultUtil to org.openrdf.query.QueryResultUtil and renamed existing class to QueryResultIO;
rewrote EvaluationStrategyImpl to be non-visitor based for better handing of sparql's "type errors";
adapated evaluation of some query language functions to sparql semantics;
removed a lot of underscorse;
generaly code clean up