Tue, 14 Jan 2014 15:12:29 +0200 Add datediff useful function.
Oleksandr Gavenko <gavenkoa@gmail.com> [Tue, 14 Jan 2014 15:12:29 +0200] rev 685
Add datediff useful function.
(0) -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 tip