Modify stats code and add some comments.
Fix, when statscode === 1(not 0), calculate maxDuration and average coverage.
Change __date to order destroys time.
Add start date option.
If !record.labors, let statsCode be 2.
Add type for options.
Add some comments.
Move some code to save-record.js.
Init.
Extract record from multiple log files, and watch current log files change.
Rename save-record.js to save-log-files.js.
Rename three variables.