Fix throttling, first attempt to fix gravity turn.

lib/guidance.ks

@@ -1,16 +1,17 @@
+// Functions for calculating navigational and guidance values.
 @lazyglobal off.
 
 // Returns the throttle value you should use to achieve the
 // target TWR. If TWR can't be achieved, returns 1.0. (full throttle)
 function ThrottleToTWR {
-  parameter twr is 1.5.
+  parameter targetTWR is 1.5.
 
   local m is SHIP:MASS.
   local g is 9.81.
   if HAS_GRAV_SENSOR = true {
     set g to SHIP:SENSORS:GRAV:MAG.
   }
-  return min((twr*m*g)/SHIP:AVAILABLETHRUST, 1.0).
+  return min((targetTWR*m*g)/SHIP:AVAILABLETHRUST, 1.0).
 }
 
 // Calculates the ship's current TWR.