test change
added kruskal.wallis command. added worked on make.lefse. working of lefse command. fixed bug in trim.oligos when there was an exact match to paired primers or barcodes that overlapped causing the sequence to be shorter than the barcodes and primers.  added design map class. added kruskal wallis and wilcoxon functions to linear algebra class.
Merge remote-tracking branch 'origin'
Merge remote-tracking branch 'upstream/master'
Weekly upstream merge.
minor additions
initial commit