RSWAT - Tutorial 1: Install RSWAT and get example data

RSWAT is an R package with graphical user interface. Therefore, to use RSWAT you need to:
1. Install R: www.r-project....
2. Install RStudio (recommended): posit.co/downl...
3. Then install RSWAT package from GitHub (plese see README) from this link: github.com/tam...
4. Extract the example data from RSWAT (which will be used for all tutorial videos)