* More debugging information in the import/export and font functions.

unsigned char const * so that C++ programs won't complain.
                   ___  __  __  ____    ___   ___   ___
                  / _ \|  \/  |/ ___|  / _ \ / _ \ / _ \
                 | | | | |\/| | |  _  | (_) | (_) | (_) |
                 | |_| | |  | | |_| |  \__, |\__, |\__, |
                  \___/|_|  |_|\____|    /_/   /_/   /_/

cucul_import_file().

* Updated the caca importer to reflect that; only one frame is read at the
    moment.
  * Added an "utf8cr" export format for UTF-8 + CRLF exports.
  * Updated cacaserver to reflect file format changes.

cucul_set_color() and cucul_set_truecolor() under the new names
    cucul_set_color_ansi() and cucul_set_color_argb().
  * Renamed cucul_get_color_name() into cucul_ansi_to_str().

functionality into cucul_set_attr().
  * Add cucul_ansi_to_attr() and cucul_argb_to_attr().
  * Rename CUCUL_COLOR_* to CUCUL_*.

with cucul_set_attr_ansi(). Old application will still compile (but issue
    a warning) and run, though.

as bold or underline. No higher level support for these yet, but at
    least everything is consistent.
  * Created cucul_set_attr_ansi() and cucul_set_attr_argb() which are bound
    to replace cucul_set_color() and cucul_set_truecolor().

documentation errors or imprecisions.

* Documented "text" import format.

before calling cucul_set_canvas_size(), otherwise it'll fill the new area
    with the current values.

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.

the canvas to 80 columns.

background.

a file and a memory area into a libcucul buffer.
  * Changed the cucul_import_canvas() prototype so that it uses libcucul
    buffers instead of simple memory areas.

sequences longer than 100 characters.
  * Documented the escape sequence format.

intermediate bytes.