There is no Dependency provided.
So you need to download the zip file from that link, then extract it and copy the "Library" folder and paste it in your Application folder
i.e. if your App name is "HelloWorldDemo" then paste "Library" folder in "HelloWorldDemo"(HelloWorldDemo/Library).
After this process open your project in android studio, "Library" module will show up in your project. Then, you need to add it to Application as a library dependency and then follow this instruction :
In your Module Settings:
1) Select your Application module
2) Select the Dependencies tab on the right
3) Click the '+' icon on the bottom
4) Select Module Dependency
5) Select your desired library module (Library Folder)
Check this links for ref :
1) AndroidStudio - Module Dependencies in Gradle
2) How do I add a library project to Android Studio?
Hope it will help :)