NULD v1.2.8

Faster covers and achievements in the launcher, covers for apps.

Faster

• Covers are read from the USB in one request per file instead of 1 KB at a time.
• Achievements: the first game's query no longer waits for the update check (seconds of HTTPS at every boot),
  and the client's "still loading" answer is asked again 5 times a second instead of once.

New

• Covers for apps. An app (APPS/) has no serial: its covers are covers/<title>.c16 and _s.c16, named after
  the title the launcher shows (tools/covers.py makes them from a PNG or JPG with that name).

Changed

• launcher.txt logs each request for a home-server game's memory card ("nuld vmc remote"), to find why its save
  icon does not show yet.

Updating

With the network cable in, START at the update notice. Otherwise copy launcher.elf and neutrino/ from the
zip over the ones on your drive.