v0.9 Athens

New Feature:

• Add Map to NeoVM
• implement unbound ong model
• use the bigger gas price between global param and cmd in txpool

Integration with NEO:

• add cli function: import WIF keys
• Native contract integration with NEO
• adjust transaction witness in line with neo
• modify address scheme in line with neo
• u256\u160 reverse in interface
• Update native contract adapt to neovm
• adapt global params contract serialize and deserialize to neovm

Optimization:

• modify dbft consensus timer and add two stateless validator
• optimize vbft make proposal
• refactor p2p message
• refactor the auth contract
• Update argument serialization
• Update governance contract

Experience:

• add Api GetSmartCodeEventByBlock can return all eventlogs
• Cli add show current block height cmd
• Enable rpc, rest and ws in testmode default
• return error when cannot found default account
• add contract cli invokeCode pre execute

Security:

• add message payload size limit to avoid deserialize attack
• remove password hash in wallet
• remove tx attribute
• support different account protection level