Initial squadrons implementation.

Doesn't actually do anything yet, but squadrons are created for each
aircraft type and pilots will be created as needed to fill flights.

https://github.com/dcs-liberation/dcs_liberation/issues/276

qt_ui/widgets/map/QLiberationMap.py

@@ -562,10 +562,17 @@ class QLiberationMap(QGraphicsView, LiberationMap):
             origin = self.game.theater.enemy_points()[0]
 
         package = Package(target)
+        for squadron_list in self.game.air_wing_for(player=True).squadrons.values():
+            squadron = squadron_list[0]
+            break
+        else:
+            logging.error("Player has no squadrons?")
+            return
+
         flight = Flight(
             package,
-            self.game.player_country if player else self.game.enemy_country,
-            F_16C_50,
+            self.game.country_for(player),
+            squadron,
             2,
             task,
             start_type="Warm",