* Refine Order for Web3 compat. & add conversions
Changed some of the fields in the Order class so that it can be passed
to our contracts via Web3.
Added conversion utilities so that an Order can be easily converted to
and from a JSON-compatible dict (specifically by encoding/decoding the
`bytes` fields), to facilitate validation against the JSON schema.
Also modified JSON order schema to accept integers in addition to
stringified integers.
* Fixes for json_schemas
Has-types indicator file, py.typed, was not being included in package.
Schemas were not being properly gathered into package installation.
* Add test/demo of Exchange.getOrderInfo()
* web3 bug workaround
* Fix problem packaging contract artifacts
* Move contract addresses to their own package
* Move contract artifacts to their own package
* Add scripts to install, test & lint all components
* prettierignore files in local python dev env
* Correct missing coverage analysis for sra_client
* CI cache lint: don't save, re-use from test-python
* tag hacks as hacks
* correct merge mistake
* remove local strip_0x() in favor of eth_utils
* remove json schemas from old order_utils location
* correct merge mistake
* doctest json schemas via command-line, not code
* Implemented basic functionality for using cache layer of LocalRefResolver
* Use `importlib` instead of `imp`, since it's been deprecated. Legacy `load_module()` reloads modules even if they are already imported, causing tests to fail when run in non-deterministic ordering, so we replace it with `import_module()`
Also moved is_valid_signature() into main package module, for
simplicity.
Also consolidated a handul of in-line pylint disable directives into the
.pylintrc config file.
In addition to the ERC20 codec, also:
Stopped ignoring type errors on 3rd party imports, by including
interface stubs for them;
Removed the unimplemented signature-utils module, which was just a
stand-in when the python project support was first put in place.
https://github.com/0xProject/0x-monorepo/pull/1144
