change println!() messages to fitting log message

> Sharaf:
> do you use a special function for displaying messages?
> or simple println! will do?
>
> mitchell:
> some messages only need to be displayed occasionally
> that's why I prefer to look at these as "log" messages
> that way, you set the "log level" and you'll only get the messages you want
> for example users never want anything more than info and critical errors
> and developers want debug info available while debugging
> and some messages are good for seeing the program run (trace)
> I don't like to just use a print statement
> especially seeing developers go back and forth commenting messages between commits, it's so cumbersome

This is part of my plan for self-documenting code, or some better term. Because if you're going to comment something, then make it run and display at a useful time.