Corrected parsing issue
-Corrected issue with parsing "SEQUENCE_PRIMER_PAIR_OK_REGION_LIST" as a
python sequence object. "SEQUENCE_PRIMER_PAIR_OK_REGION_LIST" should now
be provided as a list of lists or tuple of tuples (or a combination of the
two). -1 should be used in the case where an index is ommitted. For example:
Primer3 boulder IO input: 100,50,300,50 ; 900,60,,
Primer3 python input: [[100,50,300,50], [900,60,-1,-1]]