[hm] Finish servo/fan control mode
[hm] Increase PID D lookback distance period from 39 sec to 60 sec

The derivative is an exponential moving average so that is that it will
reach 85% of its value the 45 second period. The Pid D constant should
be reduced proportionally to achieve the same output.
[hm] eepromLoadConfig now takes a number instead of a boolean.

0 - Load config from EEPROM and use defaults on magic fail
1+ - Load DEFAULT_CONFIG[n-1] into EEPROM

Does not do DEFAULT_CONFIG_PROBE!
[hm] 20130419B 24,588 bytes