Improve feedback from flyby-update-tles

[bjorgan]

Current:

Updating TLE database using /tmp/flyby-tle/visual.txt:

No TLE updates/file not found.

Updating TLE database using /tmp/flyby-tle/weather.txt:

Updated NOAA 15 (25338)
Updated DMSP 5D-3 F15 (USA 147) (25991)
Updated DMSP 5D-3 F16 (USA 172) (28054)
Updated NOAA 18 (28654)
Updated METEOSAT-9 (MSG-2) (28912)
Updated EWS-G1 (GOES 13) (29155)
Updated DMSP 5D-3 F17 (USA 191) (29522)
(...)

Maybe something like this:

/tmp/flyby-tle/visual.txt: No TLE updates found.

/tmp/flyby-tle/weather.txt: Found 145 TLE updates.
* Updated NOAA 15 (25338)
* Updated DMSP 5D-3 F15 (USA 147) (25991)
* Updated DMSP 5D-3 F16 (USA 172) (28054)
(...)