Start maintaining position estimates for WiFi only seen once.
Start maintaining position estimates for WiFi only seen once.

We only have a single observation for 4 out of 20 million unique WiFi's.
Since we adjusted the WiFi search code to do a bit smarter clustering,
single outliers shouldn't throw us off as easily anymore.

therewillbecode/ichnaea,therewillbecode/ichnaea,therewillbecode/ichnaea,mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea