Feature request: Interoperate with standard logging facilities

[dhanak]

Using the builtin logging macros (@info, @warn and co) messes up the progress bar output. It would be great if a Progress instance could act as a custom AbstractLogger, "hijack" the log messages and render them properly below (or above) the progress bar, while keeping the output nice and clean.

This is just an idea for now, but I'll try to implement it if I get around to it one day.