-lightSleep-
*add function for LCD wakeup on LCD class
*add function for lightSleep on Power class
-deepSleep-
*add specification : re-startup time can be specified on deepSleep
-utillity-
*add function :you can get a reason for startup
isResetbyWatchdog(),isResetbyDeepsleep(),isResetbySoftware(),isResetbyPowerSW();
-other-
*add attribution: deprecated function (because moved to Power class.)
M5.setPowerBoostKeepOn(),M5.setWakeupButton(),M5.powerOFF()
*add sample scketch for sleep.
Mori Naoyuki