Make command line output less verbose

[pmackay]

While recently using csvlint I found that I had to log all outputs to a log file and scroll through it to find the useful output lines describing the issues in the CSV file. Two suggestions:

• At the start, could there be an option to suppress the line of dots (which for a large(r) CSV file could be many) so the first output is the list of issues?
• If there is a open quote, could the output be truncated so the remainder of the file isnt output, just a subset of a few lines?