Added Software "Simple Temperature Controller V5"
* @file       SimpleTemperatureController.ino
* @author     Karl Zeilhofer, http://www.zeilhofer.co.at
* @brief      Regulates a heating-element to a user-defined temperature.
*             The fan-output is not used.
*
*             Features:
*               simple P-Regulator, Regulator-Gain is user settable
*               temperature ramp limitation (maximum °C/s)
*               Buzzer sounds, when temperature reached
*               keeps the temperature, when finished (user has to manually turn off the controller)
*               user settings are stored in EEPROM (written every time, the controller is disabled by the user)
*               additional informations available, instead of the title-string (DebugMode, press OK on power-up):
*                 [measured T-ramp in K/s; internal target temperature in °C; PWM duty-cycle in %]
some minor bug-fixes and cosmetic things.