Merge branch 'feature-conservativeACMI' into 'develop'

BUG: cyclicACMI: make conservative and remove faceAreas0

Need to review cyclicACMI patch non-overlap values
- values here preserve initial values only
- snGrad - used?
- wall functions - no longer call updateCoeffs with ACMI weights (?)

See merge request !46

applications/utilities/mesh/manipulation/checkMesh/checkMesh.C

@@ -175,9 +175,6 @@ int main(int argc, char *argv[])
         {
             Info<< "Time = " << runTime.timeName() << nl << endl;
 
-            // Clear mesh before checking
-            mesh.clearOut();
-
             // Reconstruct globalMeshData
             mesh.globalData();