Chinese (Simplified) Language Added - EA Update v0.4.0.59

Chinese (Simplified) has been added as a supported language. Few other little fixes that i noticed when looking at the language code, patch notes:-

• Added Chinese (Simplified) language support.
  
• Fix: Droid names became 'instance ' due to engine update, restore to if not custom name.
  
• Fix: Missing translations - customise difficulty in translations.
  
• Fix: Missing translations - sandbox/scenario save file description.
  
• Fix: Missing translations - in-game build area and tractor beam area