Fix for timer and placing.

Fixed timer of fresh bones expiration. 
Bones don't destroy things, instead place for them is searched two blocks up.
If impossible to place bones, items in inventory are destroyed, not dropped.
Config for bones only read once.
No bones in 3 block radius at spawn (0,0,0).
Bones near spawn expire faster.

I am new to Github, maybe it is mean to create pull request without asking permission? Then sorry.