Simple buzzer, 5 beeps then 3.5 second pause

Controlled by pin 9 input
Add realtime clock, use it for all timing functions, add automatic block heater control, add output pin based on garage door status

Starting adding code to log data to SD card but ran out of code space.
Moved list of commands to a separate function
Removed some duplicate strings from flash
Block heater can be turned on/off immediately or set to turn on only
after 5am and when temp is below -5C