add changes of survey.json format to description text
add changes of survey.json format to description text

eHealthAfrica/nutsurv,johanneswilm/eha-nutsurv-django,eHealthAfrica/nutsurv,johanneswilm/eha-nutsurv-django,johanneswilm/eha-nutsurv-django,eHealthAfrica/nutsurv