Added options for jQuery Cycle-like behavior.

1) Added option to setup unslider only and not .play()

2) Added option to reverse the hover action. If set, unslider will start on mouseenter and stop on mouse out

3) Wrapped the mouseenter action in a specific check for event type as it was being called too often.

New usage: `$('div').unslider({'setupOnly': true, 'reverseHover': true })`

I didn't include changes to .min.js