Add autostage option, fix bugs, tune things.

lib/launch_rocket.ks

@@ -28,6 +28,7 @@ function Launch {
   parameter LEAD_ANGLE is 5.
 //  parameter INITIAL_PITCH is 85.
   parameter MINIMUM_PITCH is 5.
+  parameter AUTOSTAGE is true.
 
   // Configure subsystems.
   RCS off.
@@ -42,12 +43,14 @@ function Launch {
 
   // staging logic. Stage as many times as needed until we finish ascent.
   // Once Apo target is attained just drop this trigger.
-  when FlameOut() or SHIP:ORBIT:APOAPSIS > APOAPSIS_TARGET then {
-    if SHIP:ORBIT:APOAPSIS > APOAPSIS_TARGET {
-      return false.
+  if AUTOSTAGE {
+    when FlameOut() or SHIP:ORBIT:APOAPSIS > APOAPSIS_TARGET then {
+      if SHIP:ORBIT:APOAPSIS > APOAPSIS_TARGET {
+        return false.
+      }
+      stage.
+      return true.
     }
-    stage.
-    return true.
   }
 
   // Hold throttle to maintain target TWR.