Updated .am files to include needed header files
Include ImfDeepImageStateAttribute.h with installed headers.
Add originalDataWindow to standard attributes.

If application software crops an image, then it should save the
data window of the original, un-cropped image in the
originalDataWindow attribute.
Sync with ILM changes:
1. Minor code cleanup.
2. Multipart support in exrstdattr.
Initial version of IlmImfUtil, a utility library that can read an
arbitrary single-part OpenEXR file, build an in-memory image from
the data in the file, and save the image in another OpenEXR file.
Integration of DWA compressor from DreamWorks Animation into IlmImf
Adding PATENTS file
Updating copyright boilerplate for DreamWorks Animation contributed
files.
Continued updating copyright boilerplate for DreamWorks Animation
contributed files
Cleanup of minor issues that Karl spotted.
Catch CMake support up to current state of sources.
Update exrmultipart.cpp

Usage of isdigit without including cctype results in build fail in windows(VC++ 2012)
Added missing <unistd.h> to allow IlmImfTest to build on 10.9.
Updated the openexr cmake files to support building with a separate
build root, as well as building as a submodule.

Removed b44ExpLogTable.h as it is autogenerated during the build process.
include <unistd.h> for rmdir on windows and osx
Fixed typo - _pixelsPerRow() -> pixelsPerRow().
Fixed operator precedence error in cpu capability check.
More cmake build fixes for separate build diretories.
Fix for issue #29 - build failure on non-intel platforms for IexMathFpu.cpp
IlmImfUtil bug fix: saving an image without providing a header produced a
file with a useless display window.  Now the display window is copied
from the data window.