WiX.Toolset.NuGet
This is a fork that adds the WiX Toolset v3.10 files, which have support for VS 2015. v3.10 is a beta release, YMMV.
This repository hosts the files used for creating the unofficial WiX.Toolset NuGet package: https://nuget.org/packages/WiX.Toolset
The files are taken from the ZIP distribution of the WiX Toolset releases (http://wixtoolset.org) and each WiX release is committed to a new branch.
Feel free to file an issue here on GitHub in case you have problems using the package.