added uclust tax assigner - this works, but covers a tiny sweep, just for testing
added uclust tax assigner - this works, but covers a tiny sweep, just for testing

gregcaporaso/short-read-tax-assignment,BenKaehler/short-read-tax-assignment,nbokulich/short-read-tax-assignment,caporaso-lab/short-read-tax-assignment,caporaso-lab/tax-credit