Begin splitting the premake5 build file apart.
Fix UE4 linking. (Sort of - still won't actually work, but it's doing the right thing in the .Build.cs at least)
Move renderers into their own directories.
Update TODO.
Convert premake5 configuration into filter.
Move src/premake to scripts/premake, which just makes more sense
Update TODO.
Get UE4 building properly, maybe? Still missing functional debug builds.