[hm] Add startup max fan speed for boosting on startup

Startup is defined as any time the setpoint is changed until the first time
the temperature is reached. Also added LED stimulus for startup and recovery states.
[hm] Output fan speed percentage in LMSU, needs linkmeterd update
[hm] Fix D term inaccurate and no alarms with native RF pit probe

The temperature derivative was only being calculated for probes which called
calcTemp(adc), so RF probes were getting very slowly changing D values
and native RF probes (which set their temperature directly) never got D.

This change makes the TempProbe check average and alarms every second
regardless of type.
[hm] 20141003 23,712 bytes