Refactor reentry into a library and make it usable by rocket.ks

prog/rocket.ks

@@ -6,6 +6,7 @@ runoncepath("/lib/throttle").
 runoncepath("/lib/stabilize_rocket").
 runoncepath("/lib/launch_rocket").
 runoncepath("/lib/sensors").
+runoncepath("/lib/reentry").
 
 clearguis().
 
@@ -71,6 +72,17 @@ MakeMenu(
   }
 ).
 
+MakeMenu(
+  stk,
+  MakeButton(rows[1], "REENTRY"),
+  List(),
+  "Execute",
+  {
+    parameter options.
+    PerformReentry().
+  }
+).
+  
 MakeButton(rows[1], "HOVER", { Hover(). }).
 MakeButton(rows[1], "LAND", { Land(). }).