Added - Changelog that documents notable changes to the project, especially the API.
0.2.0
Changed - Removed the need to pass an instance of the pigpio.pi class when creating a new sensor object. Now, everytime a new instance of Sensor is created, each instance creates a pigpio.pi class for itself.
0.1.0
Added - Reading class which encapsulates temperature and humidity data. - Sensor class to represent a DHT11 or DHT22 sensor connected to a given GPIO pin.