Fix to keep compatibility using JQuery and Prototype Together

Hello,

I am trying to use JQuery Multisortable in a legacy application. But it breaks.

Why? 
The app use prototype and jquery together and the current way that jquery.multisortable call array reverse causes a conflict between jquery and prototype.

What I did?
A tiny fix in the code. But, it resolves this annoying problem.

Thanks for share multisortable, it was really useful to me.
Follow my 2 cents for this project.

Cheers,
Gabriel Such