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/CalcManager/Ratpack/ratpak.h

@@ -225,7 +225,7 @@ memmove( (x)->pp->mant, &((x)->pp->mant[trim]), sizeof(MANTTYPE)*((x)->pp->cdigi
                 (x)->pp->cdigit -= trim; \
                 (x)->pp->exp += trim; \
                 } \
-            trim = min((x)->pp->exp,(x)->pq->exp);\
+            trim = std::min((x)->pp->exp,(x)->pq->exp);\
             (x)->pp->exp -= trim;\
             (x)->pq->exp -= trim;\
             }