Modify configuration of TimedRotatingFileHandler
Modify configuration of TimedRotatingFileHandler

This commit introduces pass a keyword param 'when' of
TimedRotatingFileConstruction, with a value 'd', as opposed to the default
value 'h'. This changes interval of log file rotation from one hour to one
day.

piotr-rusin/url-shortener,piotr-rusin/url-shortener