VTK Developers authored Apr 09, 2012 and Brad King committed Apr 09, 2012

Move source files from their former monolithic VTK location to their new
location in modular VTK without modification.  This preserves enough
information for "git blame -M" and "git log --follow" to connect
modularized VTK files to their original location and history.

Co-Author: Marcus D. Hanwell <marcus.hanwell@kitware.com>
Co-Author: Chris Harris <chris.harris@kitware.com>
Co-Author: Brad King <brad.king@kitware.com>
Co-Author: Nikhil Shetty <nikhil.shetty@kitware.com>

Changed the PrintSelf signature from PrintSelf(std::ostream&,vtkIndent)
to PrintSelf(ostream&,vtkIndent) to satisfy the HeaderTesting.

Change-Id: I462ae5d10b1d19f41f00775115d822833996b6fa

Added public method as pure virtual function in
the AMRBaseParticlesReader to query the total
number of particles.

Adde functionality for particle array selection and
on-demand loading of specific attributes.

Made the SetFileName virtual s.t. concrete methods
can override if they need to.

Initial implementation of the Flash & Enzo particle
readers that inherit from  vtkAMRBaseParticlesReader.
The major change in this commit is that particles
are now represented with VTK's native datatype
vtkPolyData instead of the deprecated vtkAMRParticles
data-structure which has been removed.

Initial commit of AMR base particles reader.