SES-1824 : Add roundtrip regression test for literals with quotes
SES-1824 : Override ParserConfig to ensure that roundtripping does not
succeed in those cases, which are not fatal by default
SES-1824 : Add NTriplesWriterTest
SES-1824 : Test for context differently based on
RDFFormat.supportsContexts
SES-1824 : Fix corner case for Turtle/Trig with two single or double
quotes
SES-1824 : Use three single quotes and three double quotes to test
Turtle/Trig specifically
Merged in SES-1824 (pull request #128)

SES-1824 : Fix issue in Turtle/Trig with two double or single quotes starting a literal.