Update jquery.quovolver.js

Fixes: reset autoplay duration after manually moving to a specific quote; change getHiddenProperty() so that it displays all parent elements in order to get property of current element.
Update jquery.quovolver.js
Merge pull request #10 from capnhairdo/master

More tweaks, to correctly get height of elements within hidden parent elements and reset autoplay duration after manually moving to a specific quote.