Just downloaded the files for the wwise integration. In the tutorial it is looking for the files AkRS3DRoom.h/cpp, AkRS3DOccluder.h/cpp, AkRS3DSoundSource.h/cpp, AkRS3DGameBlob.h/cpp, and , MixerStubFXFactory.h. I found the last two in the singleroomgl_wwise2016 folder. But I cannot find the others. In that folder is a sound.h/.cpp and a singleroom.h/cpp. Not unless you changed the names of these files, then the tutorial should reflect that.
I have also searched in the Realspace3d_wwise_Plugin >2015/2015, in the include folder there is only the stubfxfactory, in both 2015 and 16.