Slice arrays use pre-allocated pointers whose memory is managed externally. This is
unnecessary and ultimately detrimental since it prevents any kind of data fixup
(e.g. little endian to big endian, p[adding handling), and it also makes it difficult
to use Ogre data streams.
This moves the index resolution into a separate post method instead of always
checking when access. As a result, it reduces the size of it down to the size
of a pointer, as opposed to 2 pointers + 1 int. The appropriate methods are
added to the various node types to make sure they're resolved.
