Set/change the level for the stream handler for a logging object.
        Any file handlers will be left alone.
        All messages of a higher severity level than 'lvl' will be printed 
        to the screen.
        
        Args:    
            lvl (int): The severity level of messages printed to the screen with 
                    the stream handler, default = 20.

def setStreamLevel(self,lvl=20):
        """
        Set/change the level for the stream handler for a logging object.
        Any file handlers will be left alone.
        All messages of a higher severity level than 'lvl' will be printed 
        to the screen.
        
        Args:    
            lvl (int): The severity level of messages printed to the screen with 
                    the stream handler, default = 20.
        """
        # Kill off the old handlers and reset them with the setHandlers func
        for i in range(0,len(self.handlers)):
            h = self.handlers[i]
            if isinstance(h,logging.StreamHandler):
                self.removeHandler(h)
                break
        self.addStreamHandler(lvl)