Disable use of min/max macros defined by Windows headers. (#363)

Description of the changes:
  Disable Windows-provided min/max macros using the NOMINMAX flag. Add the flag to each project's pch to disable the macros across the solution.

How changes were validated:
  Project builds.
  Unit tests pass.
  Smoke tests.

Fixes #362.

src/Calculator/pch.h

@@ -8,6 +8,10 @@
 
 #pragma once
 
+// Windows headers define min/max macros.
+// Disable it for project code.
+#define NOMINMAX
+
 #include <collection.h>
 #include <unordered_map>
 #include <map>