variables on text payload
based on this conversation
currently only these items are able to be sent in sms / email / etc notifications.
- Device: $DEVICE$, variable: $VARIABLE$ with value: $VALUE$ $UNIT$. At: $TIME$ in $LOCATION$
update to allow for named variables and/or their corresponding values $VARIABLE$SPEED$VALUE$ or $SPEED$ match returns column value from Variables Data 'bucket'