SERVER-9064 speed up 2dsphere point-in-poly containment
SERVER-9072 add timed wait to Notifications
SERVER-9072 slightly cleanup removeRange, put new cloning logic out of sharding code
SERVER-9229 wait for async deletes to finish before balancer stops, to avoid test failure
SERVER-9228 don't return dups when s2cursor yields, delegate to underlying btreecursor
SERVER-9230: fix issue causing persistent v8 objects not to be tracked