Update cmake scripts for Visual Studio 2015

The open source project [login to view URL] works just fine in Visual Studio 2013 and using version 3.8 of [login to view URL] I want you to update the cmake scripts in order to be able to build the examples in Visual Studio 2015 with the current version of WiX 3.9. That would be a first $20 milestone that should be piece of cake for a cmake expert. I will award the project only to someone who can probe able to do this part. The second part is to then check the scripts to build the *refactor* branch of that project. WARNING: If you are not a cmake expert (I am not one myself) this is going to be really difficult so probably you would spend a lot of time and is maybe not a project for you.