Fixed usage of GTWSPARQLServer API.
Fix infinite looping bug in SPKSPARQLLexer.
Added SPKMutableURLRequest addUserAgentTokenName:version: method.
Fix potential memory leak in SPKNTriplesSerializer nTriplesEncodingOfString:escapingUnicode:.
Added SPKMutableURLRequest addUserAgentTokenName:version: method.
Updated Xcode files.