Finish and clean up module queries and txs

[austinabell]

• Implements Set up module CLI commands for queries #13 Add Query types and querier #9 Set up CLI commands for txs #14 which finishes the evm as a module, but a few details will be ironed out before I make this PR open for review

Notes/problems:

• EVM state transition increments nonce in the message handler and uses the current nonce to generate the address that a contract is deployed to
  • Naive solution would be to remove the nonce check within the state transition function, add the nonce increase in each ante handler, and reduce the nonce by 1 at the end of the state transition to offset the increase done within the EVM
• Unclear which (if at all) rest endpoints will be available for the module. Most queries are irrelevant outside of the web3 rpc API, and there are potential options for allowing the existing code to be compatible with cosmos standard transactions, but unclear the direction.
• Verify and write tests for the inputs of the query

Commands include:

# Basic send transaction to an account
emintcli tx evm send [address] [amount] <data> --from [key or account]
# Create evm transaction (will return address that contract will be created at)
emintcli tx evm create [bytecode] <amount> --from [key or account]

# Query storage
emintcli query evm storage [account] [key]
# Query code
emintcli query evm code [account]
# Address can be cosmos or ethereum format