doc: First pass at updating Java documentation. * doc/interpreter/java.txi: Remove deprecated functions from documentation. Add FIXME notes. Replace @var with @file macros. Trim long lines. Use Octave documentation conventions throughout. * scripts/deprecated/java_get.m, scripts/deprecated/java_new.m, scripts/deprecated/java_set.m: Change seealso references to only refer to supported, non-deprecated, functions.

{ x[NR] = $0; } END {
  print "@multitable @columnfractions .33 .33 .33";
  rem = NR % 3;
  n = NR - rem;
  for (i = 1; i <= n; i += 3)
    printf ("@item %s @tab %s @tab %s\n", x[i], x[i+1], x[i+2]);
  if (rem == 1)
    printf ("@item %s\n", x[NR]);
  else if (rem == 2)
    printf ("@item %s @tab %s\n", x[NR-1], x[NR]);
  print "@end multitable";
}