Merge pull request #4 from jianjunz/owt

Rename ics-message to owt-message, and add version 4.2.

Author: taste1981

peerserver.js

@@ -71,11 +71,7 @@ function authorization(socket, next){
   var clientVersion=query.clientVersion;
   var clientType=query.clientType;
   switch(clientVersion){
-    case '4.0':
-    case '4.0.1':
-    case '4.0.2':
-    case '4.1':
-    case '4.1.1':
+    case '4.2':
       // socket.user stores session related information.
       if(token){
         validateUser(token, function(uid){  // Validate user's token successfully.