Update - 0.83 Shadow Priest

This update focuses mainly on the character navigation system. We are aware that not all problems will disappear, but the gaming experience should be much more satisfying. We have rewritten a large part of the character code for this purpose, which will make it easier for us to improve AI later on. Thanks for all your useful feedbacks !

• New : complete overhaul of the navigation system
  
• New : new basic tutorial
  
• New : new color and animation for stars (showing quest advancement)
  
• New : possibility to remove old saved games
  

• Balance : once you validate a quest, you can't lose it anymore
  
• Balance : insults between students are less damaging for sanity
  
• Balance : students negative traits are less damaging for sanity
  

• Fix : stucked students and teachers in gates
  
• Fix : on most config, the final quest does not show twice on last level
  
• Fix : elementalist dojo french text now correctly formated
  
• Fix : condition text on students number fixed (like in the final quest)
  
• Fix : renamed bad trait for the young women teacher
  
• Fix : fix a bug where some saved game with specific encoding could not be loaded (and block loading of other saved game)
  
• Fix : typos