Protocol 005 Michelson language changes

[anonymoussprocket]

Per Nomadic, Tezos/gitlab, Cryptium/gitlab

• [x] add CHAIN_ID
• [x] add new stack instructions: DIG n, DUG n, DIP n { code }, DROP n
• [x] add APPLY
• [ ] add EMPTY_BIG_MAP k v
• [x] update Micheline/binary parser