Rename scimath.h/cpp to RationalMath.h/cpp (#36)

src/CalcManager/Header Files/CalcEngine.h

@@ -23,8 +23,8 @@
 #include "History.h"  // for History Collector
 #include "CalcInput.h"
 #include "ICalcDisplay.h"
-#include "scimath.h"
 #include "Rational.h"
+#include "RationalMath.h"
 
 // The following are NOT real exports of CalcEngine, but for forward declarations
 // The real exports follows later

src/CalcManager/Header Files/Number.h

@@ -1,4 +1,5 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
 
 #pragma once
 

src/CalcManager/Header Files/Rational.h

@@ -1,4 +1,5 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
 
 #pragma once
 

src/CalcManager/Header Files/RationalMath.h

@@ -1,6 +1,8 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+#pragma once
+
 #include "Rational.h"
 
 namespace CalcEngine::RationalMath