version 0.2   11/21/2004

    Minor improvements:
         can now handle more stars (10000) and images (3000)
         matrix is now built more efficiently, without including stars
             and images which are not part of the solution
         solvepht's "min=" and "max=" options now work properly


version 0.1   11/08/2004

    Initial release of the package.  Includes the two main programs
    "multipht" and "solvepht", plus a test Perl script "selftest.pl".

    The current code uses a somewhat fragile set of routines to handle
    the matrix algebra in "solvematrix.c".  It will fail on some --
    but not all -- machines if compiled with option "-O2", which is
    the default in many cases.  I have arranged the distribution
    so that the compiler flags are forced to be "-g -Wall" to prevent
    this from happening.  The long-term solution is to replace these
    routines with more robust code, perhaps from the GNU Scientific
    Library.