Changed the quadratic scheme to quadraticLinear (linear in the plane of the face).
Added a linear scheme based on the CFC stencil used by the quadratic scheme.

  - transfer(DynamicList&) now preserves the allocated space as-is
  - operator=(const List&) should now avoid spurious allocation/deallocation

 - shrink() should now correctly actually shrink
 - List::transfer(DynamicList&) invokes shrink() before transferring
   contents: otherwise the ununsed allocated space is never recovered
   until much, much later.
 - DynamicList::transfer(List&) no longer throws a FatalError when
   transferring in a smaller list. The original list contents are getting
   tossed away anyhow!

  - removed operator* in favour of operator() for consistency with tmp
    class. The previous use of operator() for const casting didn't work
    anyhow due to template confusion.
  - added xferCopy(), xferMove() and xferTmp() template functions instead
  - preliminary changes to IOobjects and Fields for xfer

Conflicts:

	src/OpenFOAM/containers/misc/xferI.H
	src/OpenFOAM/fields/tmp/refCount.H
	src/OpenFOAM/memory/refCount/refCount.H
	src/OpenFOAM/memory/xfer/xferI.H
	src/finiteVolume/fvMesh/extendedStencil/extendedCentredStencil.C
	src/finiteVolume/fvMesh/extendedStencil/faceStencil/faceEdgeCellStencil.H