Usability improvement

When you create a new item it complains if you didn't set the last added item's date. Typically, you'll be making a list of subsequent dates so it makes sense to increment the new item's day automatically. Also you often will just hit the copy and past button so this also sets the new items to the last row's items. The majority of times using this module I'd imagine you will have to do this and this will save your users time.