Feature/cellular

[QuantumEntangledAndy]

Fixes the discovery to handle the case when no local device ip is available

Also adds the discovery method cellular which should be added to the [[cameras]] block on the config

[[cameras]]
name = "SOMETHING"
uid = "SOMETHING"
username = "admin"
password = "SOMETHING"
discovery = "cellular"

This should get it to work on cellular cameras.

p.s. The default user is admin so if your reolink app dosen't prompt you for or allow you to create a user then that will be the username to use