collisions due to symbol mangling.

* Manually export private libcaca symbols.

a longer name but "mode" really wasn’t appropriate here.

such as "man tutorial" showing the libcaca tutorial on Debian systems.

files (like there is any chance).

* Implemented missing cucul_get_dither_contrast().

reason to keep a copy of them in the calling program.
  * Deprecate cucul_set_dither_invert(). Inverting a dither's colours is now
    done by setting a negative gamma value.

due to spaces.

* Added a few additional character pairs of the left/right rotations.
  * Added missing errno sets.

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.

Sittler. Untested.

Sittler.

for basic vt220 emulation.

* Updated export test accordingly.

to the flip/flop/rotation filters.

* Updated text test.

* Renamed cucul_*_canvas_frame() to cucul_*_frame() because we bloody well
    know that a frame belongs to a canvas.

to be ignored.

the nearest ANSI values for the current attribute. When importing an ANSI
    file, force them to lightgray on black.

of toilet needs it.

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

* Minor changes to the font2tga test program.