AdaptiveSimulatorTimer: initialization of first time step size follows the same rule as

for later steps.
PIDTimeStepControl: added maxgrowth factor which indicates the maximum allow groth of
                    the time step from one to the next value.

opm/simulators/timestepping/AdaptiveSimulatorTimer.hpp

@@ -105,8 +105,6 @@ namespace Opm
         std::vector< double > steps_;
         double suggestedMax_;
         double suggestedAverage_;
-
-        double computeInitialTimeStep( const double lastDt ) const;
     };
 
 } // namespace Opm