AweCsome Framework: Entity Framework for SharePoint Provider Hosted Add-Ins. If you need a quick Overview what it does and if it can help you, read the Why use AweCsome? document.
I will look there even more often than here. And if you have a reputation of 1500 or above. Feel free to create an "aweCsome" tag :)
If you want to build the source by yourself using Visual Studio you need to update the nuget - packages to met your local structure.
Update-Package -reinstall and you should be ready to go.