`run_model` caller

[rburghol]

• To use the run_model.php route, set in [scenario].con: set RUN_METHOD = run_model
• To run a single segment (with normal caching based on date set in config/control/script/[scenario].con)
  • run_model om 401 JB3_7053_0001 auto river run 01_run_model
• To disable cache:
  • FORCE_RERUN=1
  • export FORCE_RERUN
  • run_model om 401 JB3_7053_0001 auto river run 01_run_model