result comparison should allow differently formatted literals

[VladimirAlexiev]

tsv03 - TSV Result Format on jena reports errors because of these differences:

• "1"^^<http://www.w3.org/2001/XMLSchema#string> vs "1"
• 1.0e6 vs 1.0E6 (case of "exponent" mark)

https://www.w3.org/TR/sparql11-results-csv-tsv/#tsv-terms "SPARQL Results TSV Results Format serializes RDF terms in the results table by using the syntax that SPARQL and Turtle use".

• xsd:string is the default in RDF 1.1 and can be skipped
• haven't checked about the exponent, but I bet both are legit

[BorderCloud]

Same problem in #15 ... impossible to check all the solutions. I need to implement a definitive solution to check the different possibilities.