Adds explicit untimeago() function that removes all timeago timers and
Hooks jQuery.events.special.remove to automatically call untimeago()
Note, this does not handle automatically removing timeago timers if the
DOM elements are removed by some means other than $().remove()
This commit will fix jquery.timeago's issue to have an interval
for each timeago element on a page.
By doing this it also removes destroyed elements automatically.
As such, this commit fixes rmm5t/jquery-timeago#96 and