Basic animation package
AnimatedEach: configure which events to animate
add animation to leaderboard
clear positioning styles on completion of a move animation
minor reorg
AnimatedList is now a component
AnimatedList component can specify to only animate certain events
clarify containsElement
fix event handlers on items moved via animation
Fix removing a DomRange with more than one element.

Once you remove an element from the dom, it has no 'nextSibling'.
So don't remove elements while iterating over them.
short clarifying comment
Rewrite {{#if}} to use DomRange (without support for unless).

This allows {{#if}}s within {{#AnimatedList}} to be animated.
More xcxcs