really portable, and Visual Studio complains when they are not explicitely
    cast.

environment variables handling. Replaced that with three per-bitmap
    functions: cucul_set_bitmap_antialias(), cucul_set_bitmap_color() and
    cucul_set_bitmap_dithering().
  * Added cucul_set_bitmap_brightness() and cucul_set_bitmap_contrast()
    prototypes (but did not implement them yet).
  * Added cucul_set_bitmap_charset() to choose what characters are going
    to be used for the bitmap rendering.
  * Removed the now useless cucul_get_feature(), cucul_set_feature() etc.

AHAHAH                      _
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      ) MAIS    \            '.
     / _    _    |  JE         \
    |  a    a    /     SUIS     |
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     '-('' ).-'       ,' UN    ;
        '-;           |      .'
           \    VIEUX  \    /
           | 7  .__  _.-\   \
           | |  |  ``/  /`  /
          /,_|  |   /,_/   /
             /,_/      '`-'

POOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOORC!

* Use a custom pow() function for gamma computation.

as multiboot kernels.

properly credited authors and documented a few things.

* Renamed caca_refresh() into caca_display() which makes more sense.
  * Optimised gl_bgpal by directly storing floats instead of doing the
    conversion at runtime.
  * Handle resizing in cucul_set_size() and try to keep as much information
    as possible from the previous canvas.
  * Moved most global variables into cucul_t or caca_t contexts.
  * Moved time.c into libcaca.

of unicode letters) is now separated from the higher level rendering and I/O
(that is, libcaca). This commit totally breaks the API, but once everything
is polished I will think about source-level backward compatibility. Most
drivers are broken, but X11 still sorta works.

  The new design is much more object-oriented and allows having several
active renderers at the same time, changing renderers on the fly, and more
important, having no renderer at all (useful for converters, or when you
want to do your own renderer).

  And in case you are still wondering, the libcucul acronym has "Unicode"
because I want to support at least a subset of Unicode. There are awesome
glyphs in it, including the ones inherited from Codepage 437 such as
"gray 25%" that are used in DOS and Win32 ANSI art.

+ Renamed gammaval into gamma.
    + Fixed Doxygen comments.

+ Implemented caca_set_bitmap_gamma().

+ Introduced CACA_DITHER_FSTEIN.
  * src/caca.c:
    + CACA_DITHER_FSTEIN is the default dithering method.
  * src/bitmap.c:
    + Fixed other dithering methods. Black background does not work yet.

+ 7-3-5-1 Floyd-Steinberg dithering. Breaks all other ditherers.

+ Make sure the mouse coordinates stay within the screen boundaries even
      if the window was resized.
  * src/bitmap.c:
    + Fixed a buffer underflow in the rendering routine that caused the bottom
      and rightmost pixels to be missed in certain conditions.
    + Minor speed optimisation.

+ Fixed a bug in the dithering characters.

+ Do not report mouse motions if the coordinates did not change.
  * src/bitmap.c:
    + More documentation.

+ Updated the package descriptions to include cacaball.
  * doc/cacademo.1 doc/Makefile.am:
    + Use the cacademo manpage as the cacaball manpage.
  * src/:
    + Added #ifdef _DOXYGEN_SKIP_ME here and there to prvent Doxygen from
      documenting bizarre stuff.

+ Dither H/S/V when looking up the two nearest colours.
    + Weigh pixels in the distance calculation.
    + Factorised the lookup table calculation.

+ Fixed a minor overflow in the saturation computation.
    + Use a global lookup table for foreground/background colour selection
      in the bitmap rendering routine. This broke dithering, sorry.

+ Changed <const type> constructs into <type const>.

+ Removed caca_internal.h from the list of documented files.
  * src/:
    + Minor documentation updates.

+ Added caca_wait_event(), a blocking caca_get_event().
  * src/ examples/:
    + More documentation.
  * doc/doxygen.cfg.in:
    + doc/doxygen.cfg is now generated by configure, so that we can use
      @top_srcdir@ and we no longer need to hardcode PROJECT_NUMBER.
    + Create manpages.

+ Support for simultaneously compiled-in drivers.
    + Honour the CACA_DRIVER environment variable.
  * configure.ac:
    + Drivers are no longer mutually exclusive.

+ Doxygenated public functions.

+ If the alpha palette is all-zero, forget the alpha channel.
  * configure.ac:
    + Export HAVE_IMLIB2_H and the like.

+ If the alpha mask is 0, ignore alpha information.
    + Ditto if no alpha information is given with the palette.

+ Added antialiasing support.
    + Dithering, antialiasing and background mode can now be selected at
      runtime.
  * src/caca.c src/caca.h:
    + Renamed caca_dithering into caca_feature and extended the type to
      express background colour and antialiasing mode.
  * examples/demo.c:
    + Fixed a bug that disabled the sprite demo.
    + Draw solid flares.
  * examples/view.c:
    + Select antialiasing and background mode at runtime.

+ Moved global variables to src/graphics.c.
  * src/bitmap.c:
    + Sanitised prototypes.

+ Internally cache screen width and height.
  * src/bitmap.c:
    + Added alpha support to caca_draw_bitmap(). For now, we only treat 0%
      alpha as fully transparent, and any other value as fully opaque.
    + Slightly tuned colour weights in the renderer.
    + caca_set_bitmap_palette() takes unsigned ints.
  * examples/demo.c:
    + Added a crap render demo.
  * examples/aafire.c:
    + Set a 20ms delay.
    + Added alpha values to the palette.
  * examples/view.c:
    + Draw a gray checkered grid below the image so that transparent images
      look a lot nicer.
    + 'f' toggles "fullscreen" mode.

+ Removed a useless message.
  * src/bitmap.c examples/view.c:
    + Really fixed the endianness issue.

+ Fine-tuned the new renderer.
    + Fixed warnings.
    + Changed hardcoded values to macros.

+ Fixed an endianness issue in the byte reader.
    + Decreased precision in RGB and HSV values to avoid overflows.
    + New dithering method: 2x2 ordered.
    + New renderer, with background colour awareness.
  * configure.ac:
    + Check for <endian.h>.
  * examples/demo.c examples/view.c:
    + Fixed an endianness issue in cacaview.
    + Adapted code to the additional dithering method.