Refactored codecs to match ZMTP version numbers

src/tcp_connecter.cpp

@@ -102,7 +102,7 @@ void zmq::tcp_connecter_t::process_term (int linger_)
 
 void zmq::tcp_connecter_t::in_event ()
 {
-    //  We are not polling for incomming data, so we are actually called
+    //  We are not polling for incoming data, so we are actually called
     //  because of error here. However, we can get error on out event as well
     //  on some platforms, so we'll simply handle both events in the same way.
     out_event ();