0.83.0 - Credits Due

This release adds credits roll and fixes bugs. Changelog:

• Added credits roll.
  
• Upgrade shop now uses icons for buy / view operations. They don't obscure names of the upgrades.
  
• Fixed translations of the upgrade shop not being translated immediately after language change.
  
• Fixed typos.
  
• Repaired RCS optimizer for advanced autopilots.
  
• Ice jets no longer disappear if you pause the game.