imports in Text.RDF.RDF4H.XmlParser now explicit.
Fixes #4 reversed URIs bug in NTriplesSerializer.

1. Reported on GitHub https://github.com/robstewart57/rdf4h/issues/4 . The characters in URIs were reversed when written to handle.
2. reverseRdfTest added to testsuite/tests/Data/RDF/TriplesGraph_Test.hs . QuickCheck confirms reported issue.
3. Fixed in Text.RDF.RDF4H.NTriplesSerializer.hs , corresponding QuickCheck test now passes.
4. Other: dependency on MissingH removed.
Code cleanup twiddles throughout tests.

1. hlint used to cleanup test code.
2. Imports explicit in many tests.
3. Failed XML parsing better handled in test assertions.
four more additions to .gitignore