* Autodetect zzuf in the configure step. It might become handy.

cucul_stretch_* to avoid long function names. And the pairwise rotations
    look so nice now that they should be the real rotation chars.

* Updated test/text to show what the wide rotations now do.

suck massively for now.

* Renamed cucul_rotate into cucul_rotate_180.
  * Deprecated cucul_rotate and fix examples accordingly.
  Hope it all makes sense.

* Updated text test.

* Use UTF-8 output in test/text.c instead of ANSI.

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.

from some systems.

* Added a test for textfile loading.