Update dependencies.
Modify.
Pass collection as param rather than db.
Add record.__laborAmount.
Change record.__laborAmount to record.__laborCount.
Get latest records.
Move average(arr) to util.js
Rename getNow() to getDate(), and move it to util.js.
util.getDate accept delimiter as the second param.
if passed arr is empty, util.average(arr) will return 0.
Not convert the result of util.average() to fixed string.
Fix conflict on module util.
Add /overview.
Move mapLaborsKey to util.replaceLaborsKey().
when retrieve records, restore labors key of record.
Add a simple index.
Add cache for getOverview()
Delete.
Rename get-record.js to get-log.js
Rename save-log-file.js to save-log.js