* Implement htons/htonl in common.h just in case.

in all .c files that needed it.

from some systems.

whether we want plain ASCII, UTF-8, or CP437.

* Added a test for textfile loading.

it breaks on too many IRC clients.

default for the release, because it's not up to date and needs a lot
    of polishing.

and background colours to clear the screen.

cucul_import_canvas().
  * Renamed cucul_create_export() into cucul_export_canvas() for consistency.

skeleton of a tutorial for Jylam.

documentation page from caca.h to a separate file.

NOTES to tools/optipal.c.

* Removed most code from the raw driver and replaced it with a call to the
    caca exporter.
  * Slightly changed the caca export format and updated code accordingly.
  * Improved cacaserver error reporting.

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.

choose the background colour.

their name, eg. cucul_create() -> cucul_create_canvas() etc.
  * Moved buffer-related functions to cucul/buffer.c.

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