full visibility for calculating pages

[Niklas-Peter]

"If perPage is not set or null, the plugin calculates the pages depending on the number of visible carousel items."

Maybe you can offer an option for calculating depending on the number of fully visible items.
Example:
1st page: 2 items fully visible, 3rd item just partially
2nd page: 4th item is the first visible item
--> IMHO the 3rd item should be the first one on the 2nd page

I hope you can add this feature.

[jsor]

Not sure why i have chosen visible instead of fullyvisible. I would consider it a bug. Still have to figure out what changing it means regarding BC.