updated install script
updated install script

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