Add 4 new burials.

Burial

Skeleton

Given a shield named 'Security!', max item damage up to 441, others data similar to the vanilla shield.

Wolf

Given 5 bones named 'Its wolf, or dog?', no other data changes.

Elytra

Given 3 rocket named 'Try again?', no other data changes.

Spider

Given a string named 'A string, too bad it can't entangle the spider...', no other data changes.