Move Comments in autogenerated XML above Plugin/Steppable Stub

[maciekswat]

Currently generated Contact Plugin

   <Plugin Name="Contact">
      <!-- Specification of adhesion energies -->
      <Energy Type1="Medium" Type2="Medium">10.0</Energy>
      <Energy Type1="Medium" Type2="a">10.0</Energy>
      <Energy Type1="Medium" Type2="b">10.0</Energy>
      <Energy Type1="a" Type2="a">10.0</Energy>
      <Energy Type1="a" Type2="b">10.0</Energy>
      <Energy Type1="b" Type2="b">10.0</Energy>
      <NeighborOrder>4</NeighborOrder>
   </Plugin>

desired formatting:

      <!-- Specification of adhesion energies -->
   <Plugin Name="Contact">
      <Energy Type1="Medium" Type2="Medium">10.0</Energy>
      <Energy Type1="Medium" Type2="a">10.0</Energy>
      <Energy Type1="Medium" Type2="b">10.0</Energy>
      <Energy Type1="a" Type2="a">10.0</Energy>
      <Energy Type1="a" Type2="b">10.0</Energy>
      <Energy Type1="b" Type2="b">10.0</Energy>
      <NeighborOrder>4</NeighborOrder>
   </Plugin>