Version 0.5.856 - Multiple small improvements and fixes

• Safer loading of obsolete save games (will try to avoid errors and force to start a new game only if something went really badly wrong)
• Pause menu doesn’t block interaction with the game
• +1 item (weapon: poker)
• Multiple small fixes, workarounds and updates

WARNING: Some minor inconsistencies with old savegame may happen, they shouldn’t cause any significant data loss.