Merge from the latest gsa routines for 4.2.5.
1) options_gsa passed as function argument 2) use pvalues always to trigger Smirnov plots and correlation plots; 3) eliminated density plots in rmse analysis; 4) updated tex documentation
1) options_gsa passed as function argument 2) use pvalues always to trigger Smirnov plots and correlation plots; 3) eliminated density plots in rmse analysis; 4) updated tex documentation