ORDER BY and value comparison fixes #16
Merged
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As mentioned in the issue #15 from the original sparql project repository, only the first ORDER BY criterion was taken into account. Also, there was no predefined order between blank nodes, IRIs and literal values (or lack thereof) as described in the SPARQL recommendation.
I've fixed both issues and written some non-regression tests for them. I've also updated a MIME type in a Unit Test (change necessary with the latest version of the rdf-turtle library).
To sum up: