Re-averages windows of pileup files with 100bp windows to reduce pileup size.
changewindowSize(pileupSubset, windowSize, mode)
A subset of the pileup that pertains only to the contig/chunk currently being assessed.
The number of basepairs to average read coverage values over. Options are 100, 200, 500, 1000 ONLY. Default is 1000.
Either "genome" or "metagenome"