piaware-status should show gpsd info

[bp0]

It would be nice if piaware-status would report the GPS information, at least as it does in the web UI's status.json:

piaware/programs/piaware/statusfile.tcl

Line 166 in 0cea9bb

set data(gps) [status_entry "green" [format "GPS 3D fix at %.3f,%.3f" $lat $lon]]