1) Correct fix for Velociraptor (we need to find the DOM node and pass that in)
2) Do the same leak fix for the read marker
3) Update the dependency to our fork which is fixed to make the call we do to release memory actually work.
4) Remove the velocity-ui-pack dependency which is unnecessary because velocity-ui is included in the velocity package
* handle having a single child, rather than an array of children
* Correctly animate children which are added at the same time as the
Velociraptor, rather than added afterwards
* Set the child to hidden at the end of the initial animation, if that is
required by the style property.
