[fitsmime] FITS Mime-Types for Mosaics

[Don Wells]

William Thompson writes:
 > .. "image" .. in the MIME community [appears to mean] 2D images..

If we find that NAXIS != 2 is wrong for 'image/*', 
then maybe our proposal should be something like:

'image/fits'                -- NAXIS=2 image in the PHDU, plus optional
                               extensions

'application/fits-image1d'  -- NAXIS=1 in the PHDU, plus optional table
                               extensions

'application/fits-image3d'  -- NAXIS>=3 in the PHDU, plus optional
                               table extensions

'application/fits-imageset' -- a *set* of IMAGE extensions, plus optional
                               table extensions

-Don