* Documented most font functions.
  * Cleaned up cucul_render_canvas() and made it actually usable by external
    programs. Removed ugly printf() debug calls.

* Replaced the 8-bit internal font with a 4-bit one.

fg/bg value into its separate argb 4-bit fields.

for the moment.

skeleton for the renderer that will not last very long.

format proposal is in this file. Feel free to comment.

contain development tools that are only useful to libcaca developers.

factored common-image.c file. Feature selection such as antialiasing or
    dithering mode are still disabled.

name, but as I said, I do what I want. http://zoy.org/~sam/pb7th.png

* Removed '\x0f' from the IRC exporter until I understand why it was here.

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

* Fixed exporter headers to make Doxygen happy.

* Ooops. Compilation fix.   \,'    '-._.-\  '     ` .-'
                             .'            /         (
                            /    S        |     _   _ \
                           |        a     \     o   o  |
                           ;           m         .-.   /
                            ;       ',       '-.( '')-'
                             '.      |           ;-'
                               \    /           /
                               /   /-._  __,  7 |
                               \  `\  \``  |  | |
                                \   \_,\   |  |_,\
                                 '-`'      \_,\

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.

parameter to do what both functions did before, and even more.