Added functionality "loop" and "bind"

I have added 2 functionalities which I required in my project, I thought I should share :)

option "loop":
If true this will make the spinner automatically revert to the minimum value if it reaches its maximum, it works the same other way around.

option "bind":
This works in combination with the "loop" functionality, simply enter a spinner you would like to bind to the current one and it will automatically increase or decrease the value on that spinner when your current hits the max or minimum.