Update
Add date in a row plugin, Get continuous date count.
For example,
Input date 2015/04/30 -> 0 continuous "Day"
Input date 2015/05/01 -> 2015/04/30 - 2015/05/01, 1 continuous "Day"
Input date 2015/05/02 -> 2015/04/30 - 2015/05/01 - 2015/05/02, 2 continuous "Day"
Input date 2015/05/04 -> 2015/05/02 - 2015/05/04 , 0 continuous "Day"