Heater

Introduction:

 * Turns a specified Relay Box Port or RelayExpansion Port On/Off at specific temperatures
 * Useful for heaters etc.
 * Same principle as Chiller/Fan

Values:

 * Specified Relay Port
 * Turn On Value ( User selected in C or F - The decimal point is dropped in the code to save memory)
 * Turn Off Value (User selected in C or F - The decimal point is dropped in the code to save memory)