Version 0.97 corrects several bugs in the handling header
keywords and ASCII tables and Images.

- The HeaderCard class now has constructor
with the signature (String,String,boolean) which
may be used to generate either a comment style
card with the keyword and value
given, or a card with a null value. E.g.,
   new HeaderCard("MYKEY", "A Comment String", false) produces

  MYKEY  A Comment String
but

   new HeaderCard("MYKEY", "A Comment String", true) produces
  MYKEY   =                            / A comment string

- The handling of the EXTEND keyword has been made consistent
with FITS standards.


- ASCII tables are first read to an intermediate byte
buffer and then parsed as needed.  Bugs where this
buffer was being deleted at inappropriate times, or
left undeleted when it was invalid were fixed.
This should fix errors when AsciiTables are read
from non-seekable sources.  This should slightly
speed up most access to ASCII tables.

- In certain circumstances an Image would not be
properly initialized before it was to be written.

- The routines Header, HeaderCard, ImageData and AsciiTableData
where modified in this release.