1.4.0

Fix Sonic 1 Boss Rush start, add retro achievements, name in the icon

• Boss Rush: Sonic 1's stages are whole acts, so the players start at
  the act's last checkpoint (lampPostID), next to the boss; stages that
  already start past it (Sonic 2) are left alone
• Achievements: each retro game's own list (2013/2011 releases), unlocks
  shown, listed in the Back menu and saved to Achievements.bin; Sonic
  CD's menu entry opens the list (engine patch 0005)
• App icon and README logo: a ribbon with the name in the app's font
• Version 1.4.0