Added ohloh widget to README
Added ohloh widget to README

oskopek/carcv,oskopek/carcv,sk413025/carcv,oskopek/carcv,oskopek/carcv,sk413025/carcv,oskopek/carcv,sk413025/carcv,sk413025/carcv,oskopek/carcv,sk413025/carcv,sk413025/carcv