Add rules to generate OTU summary when there are no chimeras in the dataset
Add rules to generate OTU summary when there are no chimeras in the dataset

SchlossLab/Kozich_MiSeqSOP_AEM_2013,SchlossLab/Kozich_MiSeqSOP_AEM_2013,SchlossLab/Kozich_MiSeqSOP_AEM_2013