Add cinema exporter

Will require ParaView to have

commit 4fc7d363e92ba440b78615664d3417358a61f9a5
Author: Sebastien Jourdain <sebastien.jourdain@kitware.com>
Date:   Wed Sep 10 11:19:58 2014 -0600

    Add exporter mechanism for catalyst

    This allow users to register arbitrary data exporter
    which will then be called after each timestep to
    export or process the data the way they want.

    They just need to implement the 2 following methods:

       UpdatePipeline(time)
       Finalize()