ENH: add input surface scaling (issue #514)

- surfaceFeatureExtract
  * dictionary "scale" entry

- triSurface
- triSurfaceLoader
  * optional scaleFactor on reading

- surfaceAdd
- surfaceBooleanFeatures
- surfaceClean
- surfaceCoarsen
  * scale option

- surfaceTransformPoints, transformPoints
  * scale option as scalar or vector quantity

applications/utilities/surface/surfaceInertia/surfaceInertia.C

@@ -90,7 +90,7 @@ int main(int argc, char *argv[])
     vector refPt = Zero;
     bool calcAroundRefPt = args.optionReadIfPresent("referencePoint", refPt);
 
-    triSurface surf(surfFileName);
+    const triSurface surf(surfFileName);
 
     scalar m = 0.0;
     vector cM = Zero;