Add looped scrolling

[gargVader]

Eg: For hour, scrolling should not stop after 12. Rather it should again loop to 1 and also switch AM to PM and vice versa.
For minutes, scrolling should loop after 59.

This is similar to how Xiaomi does it.

Shouldn't be much difficult to implement.

[commandiron]

Looped scroll is exist in old versions but ı remove that feature because broke backwards feature. I will try to add this feature next rewrite of all library.

[RadioRedFox]

Hi, a very cool project, but I also join this issue. Cyclic scrolling is very necessary, at least the ability to configure optionally.