Implement charstr(), fix window()
Implement charstr(), fix window()

Track current character position, current color index, and writemask
    (writemask is otherwise ignored for now)
Make lines wider as they slope, so that diagonal lines don't drop
  out between pixels
Implement cmov2i() and charstr() using internal draw_bitmap() function
    (draw_bitmap() may be suitable for GL bitmaps, not sure yet)
Make ortho2(), move2i(), draw2i(), cmov2i(), charstr(), and writmask()
  display-listable
Change window() from ortho projection to perspective projection
  (a la glFrustum)
Initialize the lowest 8 colormap entries since those have IrisGL symbols

lkesteloot/alice,lkesteloot/alice,lkesteloot/alice,lkesteloot/alice,lkesteloot/alice,lkesteloot/alice