Animation and Rigging Tools: FAQ, Known Issues and Feature Roadmap

I Am Very New and need some help with the Installation of the Animation Rigging tools. Do I have to buy MAYA first or does it come with Unreal 4? I can not what so ever install it. I see it in the files but i do not know what to do to get it into my Unreal 4. Please bare with me I am very new at everything.