setting boost 1.46.1 as overall default, boost filesystem v2, adding some GL cxx flags and fixing houdini boost args
setting boost 1.46.1 as overall default, boost filesystem v2, adding some GL cxx flags and fixing houdini boost args

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