Multiple _animate bugfix

[glebmachine]

Let me speak from my heart!

Very glad to made a pull request for iscroll)

This patch fixed annoying case:

iscroll.scrollTo(0,-500, 1000)
setTimeout(function(){
 iscroll.scrollTo(0,-2500, 1000) // this animation will ends on a half way, cause of first scroll make that.isAnimating was set to false and break all animations, created while first in progress.
}, 500)

[kaansoral]

Just inspected the code changes, looks great, I'm going to manually integrate this to my frankestein iscroll (too many manual modifications :)

[MichielDeMey]

+1 Nice to see a fix here! :)

[glebmachine]

Ty)

[kaansoral]

I finally managed to test this on mobile devices too, iOS/Android - things seem much smoother now, thanks a lot for this improvement again

There was also rare crashes while scrolling, I think they might have been animations stacking, don't have enough experience to support this theory tho

[glebmachine]

up?