AppGameKit Tier 2 Guide updated to Visual Studio 2017

The official AppGameKit Tier2 guide has been updated to show it's use in combination with the new Visual Studio Community 2017. Existing users will find the new version available to them right now. 

The "Tier2" libraries of AppGameKit allow developers to use the AppGameKit command set from with C++ development environments. This means you benefit from the very powerful compilers and tools within Visual Studio and at the same time can still use the game ready commands that AppGameKit has to offer.