static public List<List<Sequence<IString>>> readReferences(String[] referenceFilenames) throws IOException {
  return readReferences(referenceFilenames,false);
}

static public List < List < Sequence < IString > > > readReferences ( String [ ] referenceFilenames ) throws IOException { return readReferences ( referenceFilenames , false ) ; }
read a set of references from a list of newline - delimited files .
