Read statements and parse response with registered parser
- Implemented parser wrappers for all supported by N3 library formats: Turtle, N-Triples, N-Quads, TriG, N3. For N-Triples parser the supported type is text/plain but required from N3 parser is N-Triples according to documentation and the underlying implementation, so there is a little quirk in the NTriplesParser about that.
- Extend statements reading to call registered parser using the responseType as key for resolving it. Parsing is made synchronously.
- Implemented tests to cover the new code.