Develop analogs

See merge request external/cstools!25

CST_SaveExp saves a 's2dv_cube' object creating different files by start date

See merge request external/cstools!30

Parallelization of the CST_RainFARM function and unit testing

See merge request external/cstools!22

Adding Best Estimate Index methodology

See merge request !29

Remove manual pdf introduce in develop-ens-biascorrection

See merge request external/cstools!36

Develop ens biascorrection

See merge request !15

Fix in the documentation to include a metion to S2S4E project

See merge request external/cstools!35

Functions to transform formats to s2dv_cube() and as.s2dv_cube()

See merge request external/cstools!28

Removing aperm manipulations before the Apply function in CST_Calibration.R and partly reversing corrections of Verónica.