Release v0.4.3

Update changelog

Bump version: 0.4.1dev0 → 0.4.1

Use twine to check docs

Fix setup

Add initial project skeleton

cookiecutter gh:ionelmc/cookiecutter-pylibrary

    You have succesfully created `oemof-tools`.

    You've used these cookiecutter parameters:

        _extensions:               ['jinja2_time.TimeExtension']
        _template:                 'gh:ionelmc/cookiecutter-pylibrary'
        allow_tests_inside_package: 'no'
        appveyor:                  'yes'
        c_extension_function:      'longest'
        c_extension_module:        '_oemof_tools'
        c_extension_optional:      'no'
        c_extension_support:       'no'
        c_extension_test_pypi:     'no'
        c_extension_test_pypi_username: 'oemof'
        codacy:                    'yes'
        codacy_projectid:          'CODACYTOKEN'
        codeclimate:               'yes'
        codecov:                   'yes'
        command_line_interface:    'no'
        command_line_interface_bin_name: 'oemof-tools'
        coveralls:                 'yes'
        coveralls_token:           'COVERALLSTOKEN'
        distribution_name:         'oemof-tools'
        email:                     'contact@oemof.org'
        full_name:                 'oemof-developer-group'
        landscape:                 'no'
        license:                   'MIT license'
        linter:                    'flake8'
        package_name:              'oemof_tools'
        project_name:              'oemof-tools'
        project_short_description: 'Tiny tools of the oemof project.'
        pypi_badge:                'yes'
        pypi_disable_upload:       'no'
        release_date:              '2020-04-04'
        repo_hosting:              'github.com'
        repo_hosting_domain:       'github.com'
        repo_name:                 'oemof-tools'
        repo_username:             'oemof'
        requiresio:                'yes'
        scrutinizer:               'yes'
        setup_py_uses_setuptools_scm: 'no'
        setup_py_uses_test_runner: 'no'
        sphinx_docs:               'yes'
        sphinx_docs_hosting:       'https://oemof-tools.readthedocs.io/'
        sphinx_doctest:            'no'
        sphinx_theme:              'sphinx-rtd-theme'
        test_matrix_configurator:  'yes'
        test_matrix_separate_coverage: 'yes'
        test_runner:               'nose'
        travis:                    'yes'
        travis_osx:                'yes'
        version:                   '0.4.0.dev0'
        website:                   'https://oemof.org'
        year_from:                 '2014'
        year_to:                   '2020'

    See .cookiecutterrc for instructions on regenerating the project.