Make sure we include all OpenEXR related headers with <OpenEXR/foo.h> and remove the addition of the OpenEXR sub-folder from system search paths
EXR fix: multi-part exr is required to have "name" attribute for each part.
The EXR "name" attribute corresponds to our "oiio:subimagename".
iconvert: fix to handle multi-image files that can't append subimages
IBA::pow, oiiotool --cpow : raise pixel values to a power
iv info window should print native file info, not translated IB info.
Fixes a minor typo.
oiiotool --label lets you label and save the top image on the stack
oiiotool --stats for deep files prints which pixel had the most samples
as well as the the min and max depth and which pixels contained them.
Build libOpenImageIO_Util containing just the utilities from src/libutil.

This is useful for apps that like the stuff in libutil but don't actually
need to read and write images or need any of the Image* classes.

Make/CMake option BUILD_OIIOUTIL_ONLY=1 will cause only this to be built,
and will not build libOpenImageIO at all (can be faster if you truly only
need to build the utils to link against an app).

Moved all the unit tests specific to libutil (and unit tests that are
related to header-only utility classes) there, instead of libOpenImageIO.
Beef up strutil_test
Fix Strutil::split for the case of non-default maxsplit
Camera Raw input, contributed by Mark Boorer (using libraw)
LG minor amendments and reformatting to LibRaw support.
Rename USE_RAW to USE_LIBRAW (and other similar renamings).
Add LIBRAW_PATH to allow a non-system custom LibRaw installation to be specified.
Expose USE_LIBRAW and LIBRAW_PATH to the Makefile wrapper.
Fix flash explanation if it's an int rather than uint
Beefed up raw metadata handling
Merge pull request #773 from lgritz/raw

Raw camera support from Mark Boorer (with some enhancements by LG)
Fix missing return in ImageBugAlgo::flatten().
Fix ImageCache::get_pixels() for chbegin != 0 case.

The source data channel offset was being applied using the size of the destination datatype rather than from size of the source datatype.

Fixes #759.
Update ref image after recent 'flash explanation' change
DPX bug fix -- inappropriate use of "dpx:ImageDescriptor" could make invalid files.

A simple recipe for disaster was
  "oiiotool rgba.dpx --ch R,G,B -o rgb.dpx"
You'd think this would simply strip the alpha from an RGBA file, but
rgba.dpx reported a "dpx:ImageDescriptor" metadata of "RGBA", which when
propagated to rgb.dpx made it produce a file that looked like it still
had 4 channels.  Oops.

So this patch ignores the "dpx:ImageDescriptor" metadata upon output, instead
generating the output descriptor based on the number of channels (and in some
cases, refining if the channel names suggest a specific standard interpretation).