Wimsapi

* WIMS accept request saving user with invalid `quser`, removing or changing
invalid character. But `wimsapi` was taking this change into account, the `quser`
attribute of the user was thus invalid, causing problem when further communicating with
the WIMS server.
To solve this problem `User.save()` now has a `adapt=True` keyword argument. When `True`,
the `quser` attribute will be modified to match the one used by WIMS. If `False`, the
user created on the WIMS server with the modifier `quser` will be deleted and the new
exception `InvalidIdentifier` will be raised.

* Keyword argument that will be passed to every call of `request.post()` can now
be given to `WimsApi` constructor.
* Every method of `Class` creating a `WimsAPI` can also receive such argument
(`check()`, `save()`, `get()`, `list()`)
* Now use `sdist` instead of `bdist` to create new distribution.

* Now use Github action for testing and publishing

* Added `__str__` method to InvalidResponseError.

* Added `response` field to InvalidResponseError.

* Added InvalidResponseError exception in api.py when WIMS send a badly formatted response.


O.5.4

* Append `/` at the end of the WIMS server's url if it is not present when using
`WimsAPI`.

* Added adm/raw API to the documentation.