Verbose and quiet output flags

[gully]

The problem: The code prints lots of info to standard out. Some users might want more or less info, or different info.

Suggested solution: Provide a flag for verbose or quite output. The default can be the existing setup, or whatever is deemed optimal.

[gully]

I experimented with custom terminal output, namely aligning the sample positions and printing accept/reject in a single line. Looks like this:

[iancze]

It is true that the current sampling routines are a bit verbose for a default option.

I like your idea to provide a verbose flag with the output you've demonstrated. I could see how this might be helpful to quickly identify if the tuning of the MH jumps is on the right track or not.

[gully]

I liked that blog post a lot! So yeah, a good default would be no output :mute:, and then users could toggle a flag if they really had to see what was going on. Of course the log.log file could have some of this information too. In either case, a sane formatting scheme will help sort out the significant digits from the insignificant ones.