fix #249: report battery levels even if no GPS lock

@professr I noticed you added a "newStatus" observable to the GPS class.
Do you remember why you didn't remove the old GPS status (which seemed
to be dumber).  Is it just because you didn't want to risk breaking
MeshService?  (I assume) In this change I removed the old Observable
and all seems well (just using newStatus everywhere).

src/gps/UBloxGPS.cpp

@@ -160,7 +160,6 @@ The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of s
     {
         if (hasValidLocation) {
             wantNewLocation = false;
-            notifyObservers(NULL);
             // ublox.powerOff();
         }
     } else // we didn't get a location update, go back to sleep and hope the characters show up