Bundle your documentation tools to help contributors

I’d love to get active in writing more in depth documentation (I even have an open PR, https://github.com/EpicGames/UnrealEngine/pull/1464), but it’s going to be a bit more difficult without the ability to preview changes locally. I understand there is a legal issue with one of the packages you are using, so maybe you can distribute your patch but not the main tool itself? Then there are some other missing files as well, including the Visual Studio plugin (markmode or something).