Update #ifdef to work with VS 2013.
Commit project to VS 2013 Update 4.
Minimize project files, and standardize a few things.
Fix release mode build.
Correct x64 build issues.
Add x64 configuration.
Add ARM configuration for PortableRuntime.
Fix static analysis error and style.
Replace sentry with #pragma once.
Move float to the precompiled header.
Reduce global scope pollution.
Use property sheets for PortableRuntime.  Use a layered abstraction for output folders so OutDir can vary by project.
Use property sheets for WindowsCommon.