v0.2.2

Added

• Button on the toolbar to swap long and short press actions
• Brief help on game controls is shown for a few seconds when opening a game

Changed

• Auto-save timer is 30 seconds instead of 2 seconds (and will only trigger if
  the game state has actually changed).
• Small tweaks to dragging behavior in two games:
  • Tents: either short or long drag fills squares as grass
  • Galaxies: either short of long drag adds marker arrows