Dot Matrix 7x5 Font

Notes:

* if you use Emacs, use functions in char-to-hex.el to
  create a canvas to draw the character on and to create the
  hextring from the canvas.

* redefine /dotradiuses and /$DrawDot to change dot style
  (functions /$Set...Dot do it for some styles).

* in theory, bitmap dimensions could be changed by changing
  /$gridwidth and /$gridheight, but there are some places
  in the code where width or height are hardcoded... Also,
  bitmaps are encoded 1 column/byte, so radical changes are
  needed to support fonts higher than 8 dots.

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