Installing the prebuilt nuget package
This is based on the instructions at this page: https://www.nuget.org/packages/Telerik.UI.for.UniversalWindowsPlatform/
Visual Studio menu > Tools > NuGet Package Manager > Package Manager Console
In the console window that opens (bottom window of VS) run the install command for your project (see link above for current version):
Install-Package Telerik.UI.for.UniversalWindowsPlatform -Version 1.0.1.7