FIXME: write some more docs, and weed this out
FIXME: yuv conversion
FIXME: inplace processing if possible (also for matrix etc..)


image processing core. the code contains relics of several approaches
to organization, leaving it a bit disorganized. it consists of mainly
two things at the moment:

* basic ops built on top of gcc vector extensions
* generic processing words written in plain C

  4198 Jul 17 14:38 imageproc.h		plane iterator
  1539 Mar  7  2005 ops.h		support for ops macros
  1458 Jun 11  2005 s16_int.h		short int scalar ops
  2959 Dec 18 11:18 s16_mmx.h		short int mmx vector ops


 16528 Jun 23  2005 bitmap.c		bitmap<->image pack/unpack
  3058 Mar  4  2005 cog.c		center of gravity
 17039 Feb 28  2005 convert.c 		image<->image conversion/resize (FIXME!)
  6473 Mar  4  2005 histo.c		histogram based processing
  2363 Mar 18  2005 imageproc.c		relic (plane iterator)
   868 Mar  7  2005 ip.c		toplevel ip module setup
  9385 Jul 17 15:12 ops.c		basic operations (for vector extensions)
  7542 Feb 28  2005 resample.c		image resampling (zoom/rotate)
 12268 Dec 17 11:32 words.c		misc image handling words