Remove requirements.txt, update docs

CONTRIBUTING.rst

@@ -94,23 +94,20 @@ How to Add New Policy
       ``NodeType.STRING``. Use ``NodeType.TOPLEVEL`` if you need to lint
       only once.
 
-5. Run the test
+5. Running the tests
 
-   You can test by `tox <https://tox.readthedocs.org/en/latest/>`__ or
-   `py.test <http://pytest.org/latest/>`__ or the default unittest
-   module.
-
-   There are test command examples;
+   The recommended way to run the tests is by using tox
+   `tox <https://tox.readthedocs.org/en/latest/>`__, but you can use pytest
+   directly also, e.g.
 
    ::
 
-       $ pyenv local 2.7.8 3.4.1
-       $ tox
+       $ tox -e py37
 
-   If you want to test by py.test, you should add ``vint/bin`` to
-   ``$PATH`` to make acceptance tests pass.
+   If you want to test using pytest, you should add ``vint/bin`` to
+   ``$PATH`` to make acceptance tests pass:
 
    ::
 
-       $ pip install -r requirements.txt -r test-requirements.txt`
-       $ PATH="./bin:$PATH" py.test test`
+       $ pip install -e '.[testing]'
+       $ PATH="./bin:$PATH" pytest

MANIFEST.in

@@ -2,8 +2,6 @@ include README.markdown
 include LICENSE.txt
 include VERSION.txt
 include MANIFEST.in
-include requirements.txt
-include test-requirements.txt
 recursive-include vint/asset *
 recursive-exclude * __pycache__
 recursive-exclude * *.py[co]

setup.cfg

@@ -5,3 +5,6 @@ description-file = README.markdown
 max-line-length = 100
 exclude = vint/_bundles/*
 ignore = E303
+
+[tool:pytest]
+testpaths = test

setup.py

@@ -1,22 +1,18 @@
 #!/usr/bin/env python
-import sys
 import os.path
 from setuptools import setup, find_packages
 
 
-def load_requires_from_file(filepath):
-    return [pkg_name.rstrip('\r\n') for pkg_name in open(filepath).readlines()]
-
-
-install_requires = load_requires_from_file('requirements.txt')
-install_requires += [
+install_requires = [
+    'PyYAML~=3.11',
+    'ansicolor~=0.2.4',
+    'chardet>=2.3.0',
     'setuptools>=36.2.2',  # for enhanced marker support (used below).
     'enum34>=1.0.4;python_version<"3.4"',
     'pathlib==1.0.1;python_version<"3.4"',
     'typing>=3.6.2;python_version<"3.6"',
 ]
 
-
 test_requires = [
     'pytest==3.6.3',
     'pytest-cov==2.5.1',
@@ -41,7 +37,7 @@ def get_version():
     author='Kuniwak',
     author_email='orga.chem.job+vint@gmail.com',
     url='https://github.com/Kuniwak/vint',
-    download_url='https://github.com/Kuniwak/vint/archive/v{version}.tar.gz'.format(version=VERSION),
+    download_url='https://github.com/Kuniwak/vint/archive/v{version}.tar.gz'.format(version=VERSION),  # noqa: E501
     install_requires=install_requires,
     tests_require=test_requires,
     extras_require={