Property used on rowData to list the distance isn't valid

[manikjain-zz]

I was getting undefined for distance while using rowData.accuracy with Estimote Beacons on my android device.

It worked fine after I read through the entire object rowData and found rowData.distance as a valid property.

I don't have the screenshots anymore to put the failure and test here, but will try to put some here as soon as I can get my hands on the beacons again

PR here: https://github.com/MacKentoch/reactNativeBeaconExample/pull/5