Added function to limit vertex displacements that penetrate the surface or come
to close to it (closer than twice the local point pair distance) by recursively
halving the displacement vector.
Using runTime.loop() construct in app for time loop - with runTime++ at the end
of the loop - wasn't getting the polyMesh written to the final timestep. Moving
targetCellSize and internal delaunay vertex writing out of writeDual function
and calling them from the move() function.
from cvMesh at each iteration.
Modified adaptiveLinear to allow relaxation calls to be made nto necessarily
every time step. Modified sequence of calling of move() and runTime++ in cvMesh
and added a +1 in adaptiveLinear to make the relaxation start at the correct
value and finish on a positive non-zero value.
