Main changes:

V3.30b/3.31b (May 11, 2001)

01. Add functional sequences (line/box drawing)
   @[LINEWIDTH#], specify linewidth, 0-100 (you usually don't need anything
     that's greater than 10. 0 selects default value, which is 1.
   @[LINEDRAWxxxyyyaaabbb], draw a line from (xxx, yyy) to (aaa, bbb).
     The coordinates are in points (1 pts = 1/72 inch), and the origin is at
     the upper-left corner.
   @[BOXDRAWxxxyyywwwhhh] (in pts), draw a box of size (www, hhh) at (xxx, yyy).
   @[BOXFILLxxxyyywwwhhh], fill the box
     note: position (x, y) is the lower left corner of the box relative
         to the upper left corner of the printed area

02. Add functional sequences (color/gray level)
   @[RGBrrggbb], RGB color rrggbb in Hex form (e.g. ff0000 is red)
   @[GRAY0.34], set gray level. @[G#] still works but @[GRAY] is much more
     flexible, allowing you type any number between 0.0 and 1.0.
     note:
	gray level and RGB color are locked, one overwrites the other.

03. Add/modified functional sequences (font)
   @[FCourier] specify ASC font by name
   @[h###], expand h to take ASCfont number 1-999 (including bold/italic),
         H q Q to 1-99 (h regular, q italic, H bold, Q bolditalic)

04. Add functional sequences (page formatting)
   fix @[MV] offset problem.
   @[INDL23], @[INDR-20], or @[INDE], adjust column width through INDent.
     note:
        1. INDL/INDR start indent with any positive or negative value in
	   points, and INDE ends the indent
	2. the indent is relative to column margins
	2. a positive indent on right/left side (INDR/INDL) decreases column
	   width, while a negative indent on the right/left side increases it.

05. @[X#] and @[Y#] now accepts number directly, e.g. @[X1.23]. To be compatible
   with old usage, @[X1] or @[Y1] will set Cx or Cy to 1.1, not 1.0! Use
   @[X1.0] or @[Y1.0] to set to 1.0.

06. @[EPSfilname], allow filename (limit 45 chars) to be specified directly.
07. Fixed a bug in HBFopen() comment line handling
08. Introduce an optional ASCII font list file "cnprint.afl" to allow user
   define ASCII (ISO-5899-1) fonts and store font metric data in seperate files
   (previously all font metric data are in "cnprint.cmd").

09. specify EPS header file on command-line:
    -header=EPSheaderfile

10. Cleaned codes so that it works with C++ compilers

11. Enhanced -label option so that when it is followed by a number (e.g.
    -label30), it will produce 30 labels automatically.