rotorDiskSource: Corrected coordinate transformations

Now the rotor axis may be specified in other than the z-direction
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1290

src/meshTools/coordinateSystems/coordinateRotation/axesRotation.C

@@ -103,9 +103,10 @@ void Foam::axesRotation::calcTransform
         }
     }
 
-    // the global->local transformation
+    // Global->local transformation
     Rtr_ = Rtr;
-    // the local->global transformation
+
+    // Local->global transformation
     R_ = Rtr.T();
 }
 
@@ -298,7 +299,8 @@ void Foam::axesRotation::operator=(const dictionary& dict)
     }
     else if (dict.found("axis") || dict.found("direction"))
     {
-        // let it bomb if only one of axis/direction is defined
+        // Both "axis" and "direction" are required
+        // If one is missing the appropriate error message will be generated
         order = e3e1;
         dict.lookup("axis") >> axis1;
         dict.lookup("direction") >> axis2;

src/meshTools/coordinateSystems/coordinateRotation/axesRotation.H

@@ -88,6 +88,7 @@ class axesRotation
             const axisOrder& order = e3e1
         );
 
+
 public:
 
     //- Runtime type information
@@ -134,7 +135,7 @@ public:
         //- Update the rotation for a list of cells
         virtual void updateCells(const polyMesh&, const labelList&)
         {
-            // do nothing
+            // Do nothing
         }
 
         //- Return local-to-global transformation tensor
@@ -196,14 +197,14 @@ public:
         ) const;
 
         //- Transform vectorField using transformation tensorField and return
-        // symmetrical tensorField
+        //  symmetric tensorField
         virtual tmp<symmTensorField> transformVector
         (
             const vectorField& st
         ) const;
 
         //- Transform vector using transformation tensor and return
-        // symmetrical tensor
+        //  symmetric tensor
         virtual symmTensor transformVector(const vector& st) const;