* Removed vtkLagrangianBasicIntegrationModel->SharedWeights vector as the weights are all on the vtkLagrangianThreadedData class now. Instead I use just an int to count the size needed.
* All overloaded instances of FindInLocators use weights on the ThreadedData and should all be thread safe.
* vtkLagrangianThreadedData stores the LastDataSetIndex as an int rather than pointers to the dataset and locator.
* Modified InitializeThreadedData & FinalizeThreadedData on the IntegerationModel to allocate and delete vtkLagrangianThreadedData.
* Removed the void UserData on vtkLagrangianThreadedData as its not needed.
* Removed all useless CellLenght computation mode