The Arduino IDE has a built-in function for installing libraries.
Download the library as a zip file and extract it. Rename the resulting 'commonsense-arduino-lib-master' folder to 'CommonSense'.
Go to Sketch > Import Library... > Add Library... and select the folder containing the library.
If you're not using the Arduino Development Environment make sure the files are in a folder named 'CommonSense' and place the folder in your libraries folder.
Have a look at the library documentation for more information. The API methods available to developers can be found on the CommonSense Developers Pages.
Sketch examples are included with this library. You can select one from File > Examples > CommonSense.
A tutorial is available at the CommonSense Developer Portal.
Licensed under the Apache License, Version 2.0