Update ConnectionManager.js

Pulling in changes from PR #509

Author: nethip

appshell/node-core/ConnectionManager.js

@@ -170,7 +170,17 @@ maxerr: 50, node: true */
             this._send("commandResponse", {id: id, response: response });
         }
     };
-    
+
+    /**
++     * Sends a progress message to command execution (async commands only)
++     * @param {number} id unique ID of the command that was executed. ID is
++     *    generated by the client when the command is issued.
++     * @param {string} message Progress message
++     */
++    Connection.prototype.sendCommandProgress = function (id, message) {
++        this._send("commandProgress", {id: id, message: message});
++    };
+
     /**
      * Sends a response indicating that an error occurred during command 
      * execution