* 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.

can add new exporters without changing the API.

raw driver. I know it is inconsistent to have the loader in libcucul
    and the exporter in libcaca but I'll find a way to harmonise that.

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

POOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOORC!

* Changed the line, box, ellipsis etc. prototypes so that they use an UTF-8
    string instead of a single character as their last argument.

operations on canvases.

onto the other with an optional mask.

that is a bit more high level than characters.

canvas size (use cucul_init(0, 0) for the old behaviour).

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

',_`""\        .---,    
                                           \   :-""``/`    |    
          Ahaha mais vieux porc !!          `;'     //`\   /    
                                            /   __     |   ('.  
                                           |_ ./O)\     \  `) \ 
                                          _/-.    `      `"`  |`
                                      .-=; `                  / 
                                     /o o \   ,_,           .   
                                     L._._;_.-'           .     
                                       `'-.`             '      
                                           `.         '         
                                             '-._. -'