Adding bones' drop feature Before, when you died, you got to punch you bones to get...

Adding bones' drop feature Before, when you died, you got to punch you bones to get back your stuff, the bones block was not dropped. However, a lot of people wants to use them for decorations/building, and have to install a dedicated mod since 0.4.10-release. With this commit, a bones block containing an inventory is dropped/added to inventory (if enough room) when the bones block is removed. Then, when a player places a bones block by himself, he will dig it like any other basic node (eg. default:tree), not just punch it.

Thanks for reading.