update for batch variable rename

[doitian]

nervosnetwork/ckb#533

Block:

commit_transactions -> transactions
proposal_transactions -> proposals

Header:

txs_commit -> transactions_root
txs_proposal -> proposals_root

OutPoint:

hash -> tx_hash

CellInput:

valid_since -> since

Script:

binary_hash -> code_hash

Note: CKB has a bug that RPC types still have hash from OutPoint instead of tx_hash.

[ashchan]

Remaining OutPoint.hash -> OutPoint.tx_hash fix/update:

https://github.com/nervosnetwork/ckb/blob/develop/util/jsonrpc-types/src/blockchain.rs#L93