MAIN CHANGES:
- paralellization in the wrapper is now optional (cluster deactivation)
- README update with latest JavaStics/STICS versions and information
about executable installation on MacOS systems
FIXES:
- tidyr package was missing in imports
- checking if the JavaStics folder is given when forcing parameters values
in the wrapper - for several years simulations, the wrapper now is returning specific values
for stages for each year, not the same one for all the years - limitation of sub-dirs discovering (recursivity deactivated) in the
workspace for the run_system function