Opencolorio

* Additional 3d lut formats: Truelight .cub + Iridas .cube
* FileTransform supports envvars and search paths
* Added Nuke plugins: LogConvert + FileTransform
* Improved OCIO profile formatting
* GCC visibility used (when available) to hide private symbols
* A few bug fixes

* Switched file format from XML to Yaml

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* Exposed ExponentTransform
* Added CineonLogToLinTransform - a simple 'straight-line' negative
linearization. Not strictly needed (could be done previously
with LUTs) but often convenient to have.
* Added DisplayTransform.displayCC for post display lut CC.
* Many python improvements
* A few bug fixes
* A few Makefile enhancements

* Start of 0.6, "stable" branch

All 0.6.x builds will be ABI compatible (forward only).
New features (even experimental ones) will be added to the 0.6 branch,
as long as binary and source compatibility is maintained.
Once this no longer is possible, a 0.7 "dev" branch will be forked.

* Split public header into 3 parts for improved readability
(you still only import <OpenColorIO/OpenColorIO.h> though)
* Added MatrixTransform
* Refactored internal unit testing
* Fixed many compile warnings

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* PyTransforms now use native python class inheritance
* OCIO namespace can now be configured at build time (for distribution in commercial apps)
* Updated make install behavior
* DisplayTransform accepts generic cc operators (instead of CDL only)
* A few bug fixes / compile warning fixes

* OCIO is well behaved when $OCIO is unset, allowing un-color-managed use.
* Color Transforms can be applied in python config->getProcessor
* Simplification of API (getColorSpace allows cs name, role names, and cs objects)
* Makefile enhancements (courtesy Malcolm Humphreys)
* A bunch of bug fixes