+ Fixed an endianness issue in the byte reader.
    + Decreased precision in RGB and HSV values to avoid overflows.
    + New dithering method: 2x2 ordered.
    + New renderer, with background colour awareness.
  * configure.ac:
    + Check for <endian.h>.
  * examples/demo.c examples/view.c:
    + Fixed an endianness issue in cacaview.
    + Adapted code to the additional dithering method.