Added counting and aggregation documentation to README
Added counting and aggregation documentation to README

molbiodiv/meta-barcoding-dual-indexing,iimog/meta-barcoding-dual-indexing,iimog/meta-barcoding-dual-indexing,molbiodiv/meta-barcoding-dual-indexing,molbiodiv/meta-barcoding-dual-indexing,iimog/meta-barcoding-dual-indexing