update readme

README.md

@@ -7,11 +7,11 @@
 
 Getty is a asynchronous network I/O library in golang. Getty is based on "ngo" whose author is sanbit(https://github.com/sanbit).
 
-In getty there are two goroutines in one connection(session), one handle network read buffer tcp stream/udp packet/websocket package,
+In getty there are two goroutines in one connection(session), one reads tcp stream/udp packet/websocket package,
 
-the other handle logic process and write response into network write buffer. If your logic process may take a long time, you should start a new logic process goroutine by yourself in codec.go:(Codec)OnMessage.
+the other handles logic process and writes response into network write buffer. If your logic process may take a long time, you should start a new logic process goroutine by yourself in codec.go:(Codec)OnMessage.
 
-You can also handle heartbeat logic in codec.go:(Codec):OnCron. If you use tcp, you should send hearbeat package by yourself, and then  invoke session.go:(Session)UpdateActive to update its active time. Please check whether the tcp session has been timeout or not in codec.go:(Codec)OnCron by session.go:(Session)GetActive.
+You can also handle heartbeat logic in codec.go:(Codec):OnCron. If you use tcp/udp, you should send hearbeat package by yourself, and then invoke session.go:(Session)UpdateActive to update its active time. Please check whether the tcp session has been timeout or not in codec.go:(Codec)OnCron by session.go:(Session)GetActive.
 
 Whatever if you use websocket, you do not need to care about hearbeat request/response because Getty do this task in session.go:(Session)handleLoop by sending/received websocket ping/pong frames. You just need to  check whether the websocket session has been timeout or not in codec.go:(Codec)OnCron by session.go:(Session)GetActive.