move

[evm][move package] make `--arch ethereum` present in all builds, but return an error if feature `evm-backend` isn't enabled

[evm][move package] remove build dir before starting a new build

[evm] Contract modules and storage parameters (1st step) (#99)

[move package] rebuild only if sources have been modified or outputs are missing or out of date

Added ERC721Tradable and ERC1155Tradable (#94)