make reader_writer supporting non-blocking with time out
make reader_writer supporting non-blocking with time out

Kinetic/kinetic-cpp-client,chenchongli/kinetic-cpp-client,Seagate/kinetic-cpp-client,kinjalcpatel/kinetic-cpp-client,Seagate/kinetic-cpp-client,Kinetic/kinetic-cpp-client,chenchongli/kinetic-cpp-client,kinjalcpatel/kinetic-cpp-client,Kinetic/kinetic-cpp-client