Correctly copying and transforming GEO_CortexPrimitives during an ObjectMerge.
Fixed a bug that was cauing the cache to hold incorrect image data.
Merge pull request #119 from andrewkaufman/objectMergeFix

Fixed SOP merging for GEO_CortexPrimitives
Merge pull request #123 from goddardl/cacheBug

Fixed a bug with the Nuke cache when using IECoreNuke::LensDistort