cleaning up cmake defines; adding a Win32 Platform Backend

src/math/stopwatch.cpp

@@ -19,7 +19,6 @@ u64 Stopwatch::milliseconds()
 	return microseconds() / 1000;
 }
 
-
 u64 Stopwatch::microseconds()
 {
 	return std::chrono::duration_cast<std::chrono::microseconds>(system_clock::now().time_since_epoch()).count() - start_time;