Calculator (the main app project) depends on CalcManager, but only transitively: Calculator -> CalcViewModel -> CalcManager.
However, Calculator's project file currently has a direct dependency on CalcManager. Let's remove this to make it harder to accidentally introduce new dependencies between the layers.
Also cleaning up some commented-out directives in the CalcManager MSBuild file.
A few small changes to improve the view of the code in Solution Explorer:
* Delete folders from solution explorer which don't appear on disk (Resource Files, PerfTrack)
* Delete files on disk which aren't compiled into the project (Type.xaml)
* Rename CalculatorHistory.Cpp to CalculatorHistory.cpp, for consistency with other files
