[more comprehensive guide to be written]
At the moment, only the EPiBoost Binaries are available as a download. There is no base project.
The best way to get started for now, is to download the solution from source control and either modify according to your own project (appsettings, connection strings, episerver etc), or to pick and select the code that is relevant and move it to your project.
(If you take the second option, be careful to ensure global inherits from the correct page, and that you copy all of the views associated with property types)
Once EPiBoost has been set up or integrated in your project, new functionality can then be imported by getting the latest version of the EPiBoost DLL.