owner_id - m2o SK api_owners.id, owner of the application
callback_uri - char, optional, where to send results of polling in JSON format. If unset, the device has to check in with the API. If set, the API can check in with the device (via heartbeats) as well as the device checking in with the API
website - char, optional, website describing the project
settings - text json, can turn on/off sensors, GPS_polling frequency, heartbeat frequency, etc
api_heartbeat - The API will send heartbeat commands if enabled in api_apps.settings and callback_uri is valid and accepting JSON requests:
cols: id, api_id, time_sent, time_rcvd, latency, data
id - int, ai
api_id - o2m SK api_apps.id
time_sent - datetime, the unix timestamp the server sends the heartbeat ping (preferably kept in check with GPS or other high accuraacy RTC)
time_rcvd - datetime, the unix timestamp the server receives the response
latency - long, the number of ms between time_sent and time_rcvd