Backport cleos local abi file

[jgiszczak]

cleos: Add ability to specify one or more local abi files for cleos for serialzation/deserialization offline, which doesn't require nodeos RPC endpoint

new parameter:
--abi-file <contract name>:<abi file path>

Uses a local abi file for serialization and deserialization instead of getting the abi data from the blockchain; repeat this option to pass multiple abi files for different contracts

example:

action binary data => json data

./cleos --abi-file eosio.token:../eosio.contracts/build/contracts/eosio.token/eosio.token.abi convert unpack_action_data eosio.token transfer 0000000000ea30554008218410420831a086010000000000045359530000000000
{
  "from": "eosio",
  "to": "a44444444444",
  "quantity": "10.0000 SYS",
  "memo": ""
}

json data => binary:

./cleos --abi-file eosio.token:../eosio.contracts/build/contracts/eosio.token/eosio.token.abi convert pack_action_data eosio.token transfer '{"from":"aaa","to":"bbb","quantity":"10.0000 SYS","memo":"hello"}'
0000000000008c31000000000000ce39a08601000000000004535953000000000568656c6c6f

Resolves #451 and resolves #457.

[no-ccache]