Logging

[DrPennybags]

I added support for logging.
--logging wperf.log

[jhuckaby]

Thanks, but I didn't implement this because the pixl-cli setLogFile() thing adds a date/time stamp to every line, and this really messes with the output of wperf. The tables and histogram look like garbage. What you can do is can simply redirect the wperf output to a file. This automatically suppresses the progress bar, and everything looks correct. Example:

wperf http://github.com --max 10 > foo.txt

I will, however, implement your fix for the null check on resp, and credit you on the commit. Thank you for catching that bug.