code: public static DNASequence createDNASequenceWithErrorProbabilities(final Fastq fastq) throws CompoundNotFoundException
  	{
  		DNASequence sequence = createDNASequence(fastq);
  		sequence.addFeature(1, sequence.getLength(), createErrorProbabilities(fastq));
  		return sequence;
  	}
docs: Create and return a new {@link DNASequence} with error probabilities from the specified
  FASTQ formatted sequence.  The error probabilities are stored in a {@link QuantityFeature}
  with a type <code>"errorProbabilities"</code> the same length as the sequence.
  
  @param fastq FASTQ formatted sequence, must not be null
  @return a new {@link DNASequence} with error probabilities from the specified FASTQ formatted sequence
  @throws CompoundNotFoundException if DNA sequence in fastq contains unrecognised compounds