Added optional HOUDINI_BIN_PATH for when $HFS/bin isn't valid (like on mac). Added the start of mac build support to IECoreHoudini (incomplete). MACOSX_DEPLOYMENT_TARGET is set to 10.4 when building on darwin.
Added optional HOUDINI_BIN_PATH for when $HFS/bin isn't valid (like on mac).
Added the start of mac build support to IECoreHoudini (incomplete).
MACOSX_DEPLOYMENT_TARGET is set to 10.4 when building on darwin.

goddardl/cortex,davidsminor/cortex,danieldresser/cortex,appleseedhq/cortex,davidsminor/cortex,hradec/cortex,lento/cortex,danieldresser/cortex,appleseedhq/cortex,appleseedhq/cortex,lento/cortex,hradec/cortex,lento/cortex,danieldresser/cortex,goddardl/cortex,hradec/cortex,danieldresser/cortex,davidsminor/cortex,goddardl/cortex,davidsminor/cortex