v0.29.1 — the board gets column headings

Changed

• The Hall of Fame board now says what its columns are — rank, player, score and moves — so the
  numbers read without being guessed at. On a phone, where the rows stack instead of lining up in
  columns, the headings are left off: they would be labelling nothing.
• The front page has one "start playing" button per screenful instead of two. The changelog
  section's copy is gone; the Hall of Fame's is right above it and does the same job.

Fixed

• The Hall of Fame button's label sat too high. It now sits centred, like the one at the top of
  the page always did.