moved an item up in a bulleted list

src/site/apt/index.apt

@@ -86,18 +86,15 @@ Overview
 
         * multiple maneuvers
 
-      * handling of discrete events during integration
-        (models changes, G-stop, simple notifications ...)
-
       * state of the art ODE integrators (adaptive stepsize with error control,
         continuous output, switching functions, G-stop, step normalization ...)
 
       * can be used in slave mode (propagator is driven by calling application),
-        master mode (propagator drives application callback functions) or batch mode
-        (all intermediate results are stored during integration and provided back to
-        the application which can navigate at will through them, effectively using
-        the numerically propagated orbit as if it was computed by analytical model,
-        this is ideal for search and iterative algorithms)
+        master mode (propagator drives application callback functions) or ephemeris
+        generation mode (all intermediate results are stored during integration and
+        provided back to the application which can navigate at will through them,
+        effectively using the numerically propagated orbit as if it was computed by
+        an analytical model, this is ideal for search and iterative algorithms)
 
       * serialization mechanism to store complete results on persistent storage for
         later use
@@ -113,6 +110,9 @@ Overview
     * unified interface above analytical/numerical/tabulated propagators for easy
       switch from coarse analysis to fine simulation with one line change
 
+    * handling of discrete events during integration
+      (models changes, G-stop, simple notifications ...)
+
   ** Attitude
 
     * extensible attitude evolution models