render: Change how we store render passes info. Previously we used a dictionary with integers as keys, which doesn't go well with JSON serialization. Now replace with an array of fixed length with items that are `None` by default.

#!/bin/sh

CHEF_DIR=`dirname $0`
if `hash readlink 2>&-`; then
    LINKED_EXE=`readlink $0`
    if [ -n "$LINKED_EXE" ]; then
        CHEF_DIR=`dirname $LINKED_EXE`
    fi
fi
python $CHEF_DIR/../chef.py $@