Update dataset repo to version 1.0

[jteijema]

This PR will update the template to version 1.0, and test it's functionality.

[jteijema]

Will take care of #6 #7 and #1.

[jteijema]

Installing this template adds the datasets to the DatasetManager.

[J535D165]

Thanks, few suggestions, and some styling issues.

[jteijema]

Updated the dataset file to pep8 style @J535D165

[jteijema]

@J535D165 ASReview still has a problem handling local files I think:

ERROR:root:<urlopen error unknown url type: c>

Moreover, the code for the filepath is currently;

            filepath=str(Path(Path(__file__).parent,
                              'data',
                              'your_dataset.csv')),

I think being able to give a path instead of a str would be optimal.

Giving a path results in:

ERROR:asreview.webapp.start_flask:Exception on /api/datasets [GET]
Traceback (most recent call last):
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 2077, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1525, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask_cors\extension.py", line 165, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1523, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1509, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\asreview\webapp\api.py", line 291, in api_demo_data_project
    response = jsonify(payload)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\json\__init__.py", line 301, in jsonify
    f"{dumps(data, indent=indent, separators=separators)}\n",
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\json\__init__.py", line 131, in dumps
    return _json.dumps(obj, **kwargs)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\json\__init__.py", line 234, in dumps
    return cls(
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\json\encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\json\encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\json\__init__.py", line 50, in default
    return super().default(o)
  File "C:\Users\5927226\AppData\Local\Programs\Python\Python39\lib\json\encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type WindowsPath is not JSON serializable
ERROR:root:Object of type WindowsPath is not JSON serializable