bump
ExponentOp collapsing fix.

The exponent op is unique in that the inverse transform is represented by
inverting the exponent, rather than storing an explicit forward/inverse flag.

However, the internal inversion math was done at float precision which meant that
for some exponents a forward / inverse pair would not exactly cancel out.

Example: 1.037289f, 1.019015f, 0.966082f

This fix stores the exponent at double precision, while doing inverse checks at
float precision, allowing accurate collapsing.

This does not impact performance as the actual image processing still works at
float, only the internal exponent coefficients are stored as doubles.
* updated setuptools, docutils, jinja, pigments, sphinx
* added includehidden arg to toctree() in olio theme
* some doc string updates
fix build when using libc++
* added support form yaml-cpp > 5.0.1
* when yaml-cpp < 5.0.0 define OLDYAML
* added yaml-cpp 5.0.1 tarball in preparation for moving to the new api
* added OCIOYaml class and moved all yaml-cpp code into OCIOYaml.cpp
* moved Config serialize code into OCIOYaml.cpp
* added Config::setEnvironmentMode(), Config::getEnvironmentMode(), Config::loadEnvironment()
* moved Display code from Config.cpp into it's own files
Fix YAML/TinyXML patches for GCC versions older than 4.2
* fixed getcwd error on OSX maverick
* fixed -undefined dynamic_lookup warning on OSX
* fixed multiple extern C warning in pyglue
* fixed visibility when using clang
FileFormatTruelight: Added write support for truelight luts (with unity shaper lut)
FileFormatTruelight: Updated whitespace to match the output of Truelight
It looks the LookNoOp was copy pasted from the FileNoOp and some names were not updated