Deluxe auto-map stage names

This patch calculates the stages of the current vehicle and arranges the stages
into "pre-launch", "liftoff", "stage_*_separation" in the correct order.

ksp_client.py

@@ -16,7 +16,7 @@ def main():
               1: "liftoff",
               2: "stage_1_separation",
               3: "stage_2_separation"}
-    stage_map = dict([(i,i) for i in range(10)])
+    stage_map = dict(zip(range(10), range(10, 0, -1)))
 
     context = zmq.Context()
     socket = context.socket(zmq.PUB)
@@ -38,8 +38,10 @@ def main():
 
     def stage_changed(new_stage):
         try:
-            socket.send_string(f"{topic} {stage_map[new_stage]}")
-            print(f"Sending event {topic} {new_stage}")
+            stage_mapped = stage_map.get(new_stage, new_stage)
+            stage_name = states.get(stage_mapped, "Unknown")
+            socket.send_string(f"{topic} {stage_name}")
+            print(f"Sending event {stage_name} ({stage_mapped})")
         except Exception as e:
             pass
 
@@ -52,6 +54,9 @@ def main():
         running.clear()
         vessel = conn.space_center.active_vessel
         control = vessel.control
+        vehicle_stages = max([p.stage for p in vessel.parts.all]) + 1
+        stage_map = dict(zip(range(vehicle_stages + 1),
+                             range(vehicle_stages, -1, -1)))
         stage = conn.add_stream(getattr, control, 'current_stage', scene)
 
         stage.add_callback(stage_changed)