Logging to console

[oczoske]

I'm mostly running scopesim in an ipython console - very simple and old-fashioned. In order to get logging.info and logging.debug to print to the console I have to use the rather unintuitive sim.stdout_handler.setLevel("DEBUG")
as I found out after a rather lengthy search (repeated due to weak memory). Scopesim seems to offer two more intuitive ways to set the level via sim.utils.set_logger_level(which="console", level="DEBUG") or cmds["!SIM.logging.console_level"] = "DEBUG", but none of these appear to work.
The default level is WARNING. I'd prefer INFO, if only to keep the user entertained while scopesim is doing its thing (more usefully as a progress monitor). However, for notebooks this may already be too much clutter.

[teutoburg]

This was further improved in #349 with the addition of the sim.set_console_log_level() convenience function.