Add README and udpate packaging metadata.

MANIFEST.in

+include LICENSE
+include README.rst

README.rst

+Temporary PostgreSQL databases for Django and pytest
+====================================================
+
+Use case
+--------
+
+This pytest plugin can be used to test a Django application that uses
+PostgreSQL. It leverages the `testing.postgresql`_ module to setup a
+temporary PostgreSQL database server and injects the configuration for it
+into Django's settings. It is intended to be used together with
+`pytest-django`_.
+
+Requirements
+------------
+
+`testing.postgresql`_ needs the postgresql server binary available.
+
+How to use
+----------
+
+To use, simply install the package in your testing environment and laod
+the `django-testing-psotgresql` plugin when running pytest (pytest normally
+auto-discovers it).
+
+The plugin re-uses the configuration used by `pytest-django`_.
+
+Limitations
+-----------
+
+.. _testing.postgresql: https://pypi.org/project/testing.postgresql/
+.. _pytest-django: https://pypi.org/project/pytest-django/

setup.py

+from os import path
+
 from setuptools import setup
 
+this_directory = path.abspath(path.dirname(__file__))
+with open(path.join(this_directory, 'README.rst'), encoding='utf-8') as f:
+    long_description = f.read()
+
 setup(
     name="pytest-django-testing-postgresql",
     version='0.1',
     description='Use a temporary PostgreSQL database with pytest-django',
+    long_description=long_description,
     author='Dominik George',
     author_email='nik@naturalnet.de',
     url='https://edugit.org/nik/pytest-django-testing-postgresql',
 
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'Framework :: Django',
+        'Framework :: Pytest',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Programming Language :: Python :: 3'
+    ],
+
     py_modules=['pytest_django_testing_postgresql'],
     install_requires=['dj-database-url', 'testing.postgresql'],
+    zip_safe=False,
 
     entry_points = {
         'pytest11': [