Hi Matt,

Do you want to push your Maestro changes so that we can
take a look at them, see how they are implemented?

Please find attached my first run-through of adding Maestro support as an hg bundle.  There were only a few things I had to change from the Orion frontend because they both use the BoxLib data format.  I did have to make a change in the OrionStaticOutput._is_valid method to distinguish between the two formats.

I often wondered if it would make more sense to split the frontends based on file format, and then let each code subclass from a particular frontend?  For example, have an HDF5 frontend that Flash and Enzo can subclass.  I'm not sure it would make things any cleaner...