update Estimator class

[Niklas Korsbo]

some of its current functions will have been transferred to the SimulationCost? class.

it must have:

• a vector of simulationCost class instances
• a vector of weights for the different (total) simulation costs. Maybe call it simulationCostVector
• in a for loop, it must call S*->updatePointer(simulationCostVector[i]), followed by S*->simulate()
• in the end it must collect and weigh up all the costs of the simulations into one final value.
• it must have a parser for the .est file. The existing one must be changed. During the parsing it will occasionally have to pass the inputstream to its daughter classes.