Unified command handling #1041, #1042
Ensure open/fullsetup command executes correctly returning the righ db for server/replicaset and mongos #1044
Added isConnected returns false on server is no connection pool set, #1043
Changed bson size checking to happen at size calculation of inserts instead of allowing it to fall through to the server, #1037
Added bson check to other wire protocol commands, #1037