Added 'ppModelSetup' for experiment setup

Performs the pre-processing of predictors, predictands and simulation data. Its output is passed to the perfect-prog downscaling methods
Modified to receive input from ppModelSetup
New getCoordinates utility
Modified ppModelSetup output

1.) Comnputes simulation dates
2.) incorporates new method getCooridnates
Minor changes in analogs

For better integration with new ppModelSetup
Doc update