made some improvements at code level, but not working as expected

P_LED (addr 25) is not the same as P_ALARM_LED (addr 17). They just
happen to share the same physical LED. Sorry for the oversight.

The source still overrides P_ALARM_LED and P_ALARM_SHUTDOWN
Removed alarm() function in step(). Removed alarm() function from Servo.cpp for now

this was causing severe performance slowdown. Removed alarm () function
from Servo.cpp for now