BMO 1.31.0

A proper install screen, and a new game while he swaps brains.

• The new game: BMO runs, you jump and duck. Each level is faster, and it
  keeps your best score.
• His own screens have pixel lettering and a green grid now.
• Swapping straight back to the brain you just left is quicker.
• New installs get one setup screen with every step listed, a tick for
  each one and real progress bars. Internet first, then Linux's updates,
  then the downloads; the microphone, voice and screen checks wait until
  you press Enter. If a step fails he tries again, carries on, and comes
  back to it at the end instead of getting stuck.
• The downloader keeps going past one that fails and waits for the
  internet instead of giving up.