Toggle line truncating over filling #140

It would be nice to be able to toggle line truncating over filling.

Some JSON documents are very deep (and thus wide) and what jqp does is to fill the lines instead of truncating them at the end. I might be an odd bird here but this way of dealing with long lines is very distracting to me. 😢

Thanks a lot for jqp btw! I'm generally a very happy user!