A simple Arduino Sensor/map wrapper

1. #include <Sensor.h> at the top of your file
2. Instansiate with Sensor sensor_name(pin, min_voltage, max_voltage, min_value, max_value); i.e. Sensor temperature(A0, 515, 240, 70, 98);
3. Use the mapped value by using sensor_name.value() (or for the example, temperature.value()