create SimulationCost class

[Niklas Korsbo]

simulation cost keeps track of all the information (init, cost template stuff, etc) needed to run and evaluate a single simulation. It will be owned by the Estimator class instance, and will in turn own CostFunction? class instances.

SimulationCost? should have the following things:

• init_ and costTemplate_
• a vector of CostFunction? class instances.
• a means of receiving the current state, y_, vector from the solver. And a way of passing this to the cost functions.
• a vector for the weighting of the different cost functions.
• a parser which takes an inputstream and determines what to do.

Basically, it needs:

initiate init_, timepoints, cost...

parseInput (on initiation of the program)

costFunctionVector=...

anytime the solver calls for an update of the cost do:
  for i
    costFunctionVector[i]::updateCost(y_)
done

for i
  cost += costFunctionVector[i]::executeCalculation()
done