removing named return values

- avoiding confusion w long functions for naked returns

command.go

@@ -12,7 +12,7 @@ type Command struct {
 
 // payload function type handling commands. The returned error is parsed and, if no error,
 // is detected then the response string (res) will be sent in response to the command message
-type Payload func(msg Message) (res string, err error)
+type Payload func(msg Message) (string, error)
 
 // contains the basic information needed for a message command
 type Message struct {