Test and demo program BlinkOnPi as MBean. 
  
  Contrary to 
RdGnPiGpioDBlink the test and demo
  program 
BlinkOnPi makes full use of Frame4J
  by inheriting 
App. 
  Hence, additionally to the operations and properties of 
  
RdGnPiGpioDBlink respectively
  
RdGnPiGpioDBlinkMBean extended here we have also
  
AppMBean.
  Optionally, also 
UIInfo (implemented by 
  
App can be extended (not recommended).
  
  As for standard MBeans the interface shall be named according to the 
  applications class one can't use interface multiple inheritance there.
  Hence, this interface just bundles those needed for JMX/JConsole.
  
  Copyright  ©  2021  Albrecht Weinert