I don't know if it's worth making the readme wordier, but I have already seen the discussions and confusion about this. I wonder if it's worth stating that ```lan``` is usually satisfied by a wifi connection, but not necessarily depending on the device. So on an unagi ```lan``` would mean wifi, on a pandaboard it would mean x, etc.  It's probably not worth all the extra verbiage, but I do think there is still the potential for confusion. 

```lan``` really means "it needs an internet connection that *is not* cell data", correct?