Segemented config works for me (TM)

Small GPS Fix that cropped up while testing included.

src/gps/GPS.h

@@ -57,6 +57,9 @@ class GPS : private concurrency::OSThread
     /// Returns true if we have acquired GPS lock.
     virtual bool hasLock();
 
+    /// Returns true if there's valid data flow with the chip.
+    virtual bool hasFlow();
+
     /// Return true if we are connected to a GPS
     bool isConnected() const { return hasGPS; }