Enable multi file compile for MSVC

Pulse.cmake

@@ -19,9 +19,9 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CONFIGURATION_TYPES "Debug" "Release" "RelWithDebInfo" CACHE STRING INTERNAL FORCE )
 if(MSVC)  
 # Using MD as that seems to be what I run into alot, you could change these to /MT and /MTd if you want...
-  set(CMAKE_CXX_FLAGS_DEBUG "/D_DEBUG /MDd /Zi /Ob2 /Oi /Od /RTC1" CACHE STRING INTERNAL FORCE)
-  set(CMAKE_CXX_FLAGS_RELEASE "/MD" CACHE STRING INTERNAL FORCE)
-  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/MDd /Zi" CACHE STRING INTERNAL FORCE)
+  set(CMAKE_CXX_FLAGS_DEBUG "/D_DEBUG /MDd /Zi /Ob2 /Oi /Od /RTC1 /MP" CACHE STRING INTERNAL FORCE)
+  set(CMAKE_CXX_FLAGS_RELEASE "/MD /MP" CACHE STRING INTERNAL FORCE)
+  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/MDd /Zi /MP" CACHE STRING INTERNAL FORCE)
 endif()
 
 if(MINGW)