Visual Studio Load and Web Test plugins by LIL
The Project builds a DLL file (LIL_VSTT_Plugins.dll) which you need to add a reference to in your Test Project in order to use the plugins. The file will by default be distributed to agents during a loadtest. If you want easy access to this DLL for all users, you can copy the file to the PublicAssemblies folder in VS install directory (C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\PublicAssemblies for VS2015). This way VS will be able to automatically find the file for Projects already containing a reference, unless you place a copy of the dll file in each Test Project (create a lib directory and copy the dll to it, add a reference by browsing to the dll file).
Building
Build the Project using Release config and make sure you build for .NET Framework 4.5 if you want to use the TLS 1.2 features (see the Pages for more details). The solution also contains a Test Project, it is not needed for use of the plugins, it is only used to test the plugins during development.