Introduced the new file unitConversion.H to hold degToRad, radToDeg

and other unit conversion functions as they are required e.g. slug <-> kg.

tutorials/compressible/rhoCentralFoam/biconic25-55Run35/datToFoam/datToFoam.C

@@ -43,7 +43,7 @@ Description
 #include "cellShape.H"
 #include "cellModeller.H"
 #include "mergePoints.H"
-#include "mathematicalConstants.H"
+#include "unitConversion.H"
 
 using namespace Foam;