- made the translation container a class.

This also splits off some Doom-specific implementation details into higher level headers.

src/scripting/thingdef_properties.cpp

@@ -756,7 +756,7 @@ DEFINE_PROPERTY(translation, L, Actor)
 				}
 			}
 		}
-		defaults->Translation = CurrentTranslation.StoreTranslation (TRANSLATION_Decorate);
+		defaults->Translation = palMgr.StoreTranslation (TRANSLATION_Decorate, &CurrentTranslation);
 	}
 }