thanks to Sean D'Epagnier.

int which shall be used as an UTF-32 character. We do not have any casting
    problems due to the signedness of chars because all characters were
    ASCII (ie. <= 0x7f) beforehands.

better performances.

arguments are at least 32 bits.

in all .c files that needed it.

now x/y/width/height instead of x1/y1/x2/y2. Avoids unnecessary +1/-1
    computations.

values between 0 and 9 (used to be 0 and 10). Updated documentation
    accordingly.

* Renamed canvas handle variables from "c" to "cv". Eh ouais mon gros.

such as cucul_dither_t instead of struct cucul_dither.
  * Made cucul_buffer_t an opaque structure and implemented the two getters
    cucul_get_buffer_data() and cucul_get_buffer_size().
  * Documented all missing functions and function parameters.

remove redundencies in the Doxygen documentation.

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                      _
    _._ _..._ .-',     _.._(`))
   '-. `     '  /-._.-'    ',/
      ) MAIS    \            '.
     / _    _    |  JE         \
    |  a    a    /     SUIS     |
    \   .-.                     ;  
     '-('' ).-'       ,' 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.