off-line rendering into image files, camera path, first version of catalyst support

Rather a big pull request with various changed to tools. 

* bonsaiRendering  can  read cameraPath file with translation/rotations of the camera [example camera file is provided]. This can be used for off-line rendering of the movies.
* bonsaiRendering now support image write to the file for every frame
* first version of ParaView/Catalyst support for Bonsai [in-situ] rendering.