I'm not a programmer. This is my first commit ever, and the first time manipulating Python code.
That said, this modification makes the not-so-'--forecast' forecast (the default text-based short-term forecast for the current day) an option, '--daycast'.

It works, so I guess I was able to accomplish the goal without breaking anything that I know of so far.
My only concern is that it didn't update the sqlite database with the new daycast option stuff, and I don't know yet if that by initial design or if I missed a step.