Added enchancement for #1994 by adding two parameters to .stop() which give additiona...

Added enchancement for #1994 by adding two parameters to .stop() which give additional functionality.  The first parameter clearQueue will clear the queue on the necessary DOM elements so all animation will stop.  The second parameter will cause the currently playing animation to immediately complete including reseting original styles on show and hide and calling the callback function.  If no parameters are passed it will work as it always did.

While adding unit testing I noticed the stop() unit test wasn't working correctly because the element was hidden so I fixed it and added more unit tests around the new functionality.  I also added a cursor:pointer to the css (because for a long time I didn't know they were clickable).