Dax is a header only fine grained library that aims to ease
the difficulty of writing highly parallel code.

This commits adds to VTK the ability to seamlessly call dax algorithms
as vtk fitlers. One of the primary features of this module is the
ability to use vtk allocated memory within DAX without any copies
happening.

Be warned while Dax worklets are easy to write, the code to convert
a runtime system like VTK to a compile time system like DAX can
be difficult to read.

Change-Id: I4467a708c7789bb210e5c8ce51d10dc1ffd52aec