added shared list for pairs currently being measured in order to facilitate multiple clients. also, now giving up on a pair after 10 failures since they tend to be unmeasurable after this point anyway
added shared list for pairs currently being measured in order to facilitate multiple clients. also, now giving up on a pair after 10 failures since they tend to be unmeasurable after this point anyway

hammadmazhar1/ting,hammadmazhar1/ting