Added support for Illumina 1.8 in guess-encoding.py .  Also added a comment that explains that the maximum possible is actually 126.
Added support for Illumina 1.8 in guess-encoding.py .  Also added a
comment that explains that the maximum possible is actually 126.

brentp/bio-playground,brentp/bio-playground,brentp/bio-playground,brentp/bio-playground,brentp/bio-playground,brentp/bio-playground