changed GenbankReader to not skip the fourth set of start and stop for an exon
changed GenbankReader to set the gene sequence stop site without -1
changed ThreadedSequenceSetter to set the gene sequence stop site without -1
changed nothing in SequenceContentAnalyser
changed MRNA to get an exon sequence stop site without -1
changed IntronExonBoundaryTester to do more tests
added more tests in TestMRNA and TestAll
made tester class TestIntronExonBoundarTester