+ Added a check for imlib2-config.
    + Build cacaview conditionally.
  * examples/demo.c:
    + Removed all gdkpixbuf code.
  * examples/view.c:
    + Default to ordered dithering.
    + Make sure the arrows always work even if delta is too small.

+ Simple image viewer, cacaview, based on libcaca and imlib2.
    + Renamed caca-demo into cacademo.
  * doc/:
    + Renamed doc/caca-demo.1 into doc/cacademo.1.