Added GEMINI capability
Merge remote-tracking branch 'origin/master'
modified the swidth value to be consistent with mkpsf choices
Makepsf has been modified to be more careful about round-trip flux values.

Now if you plant a source with mag X and measure it with the correct aperture you get back a source of mag X.
Minor formatting changes.
Better mkdir function, also handles getting cutouts from VOSpace correctly when the full file is present on disk.

The full file on disk should be an opportunity for faster data access.  Making that so is TBD.
Added a VOFileHandler for use with logging.  Likely this will continue to evolve.
now use the new VOFileHandler for logging messages.