bib: Add CHI and CATPAC SUNs, and CURSA conference paper.
Initial draft describing the FITS2NDF TABLE with an example.
Change SUN/55 date.

1996 was the time the TABLE structure and on-the-fly conversion were
added.  It makes more sense than the latest 2012 edition for the
historical context.
Fix a couple of typos.

Some years ago I read in the Chicago Manual of style that the word
after a hyphen in a compound noun does not begin with a capital.  So
it would N-dimensional Data Format.  It depends whether you think the
D in NDF referes to Dimensional or Data.  Anyway I've just made it
consistent and the way SGP/38 does it.