added test (#13)
added options for credentials of Super Admin (#13)
added test (#13)
improved variable name detection (#13)
improved variable name pattern according to definition at <http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#rVARNAME> (#13)
changed creation of exception to ensure that the original stack trace is not lost
added test (#13)
fixed column reference bug (#13)
improved type documentation
added test (#13)
prevent serialization of the store (#13)
added test for blank node handling (#13)
added support for blank nodes (#13)
added test for XML result format (#13)
fixed test: XML string is expected (#13)
added support for XML format (#13)
added test for JSON result format (#13)
improved test (#13)
added stub for JSON converter and test case (#13)
implemented JSON converter (#13)