Add further package metadata

setup.py

@@ -1,19 +1,55 @@
 from setuptools import setup, find_packages
 
-setup(name='mailosaur',
-      version='7.0.0',
-      description='Python client library for Mailosaur',
-      url='https://mailosaur.com',
-      author='Mailosaur Ltd',
-      author_email='[email protected]',
-      keywords='email automation testing selenium robot framework',
-      license='MIT',
-      packages=find_packages(),
-      install_requires=[
-          'python-dateutil',
-          'tzlocal',
-          'requests',
-          'requests[security]'
-      ],
-      zip_safe=False, requires=['requests'])
+# read the contents of your README file
+from os import path
+this_directory = path.abspath(path.dirname(__file__))
+with open(path.join(this_directory, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
 
+setup(
+    name='mailosaur',
+    version='7.0.0',
+    description='The Mailosaur Python library lets you integrate email and SMS testing into your continuous integration process.',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
+    author='Mailosaur Ltd',
+    author_email='[email protected]',
+    url='https://github.com/mailosaur/mailosaur-python',
+    license='MIT',
+    keywords='email sms testing automation selenium robot framework',
+    packages=find_packages(),
+    zip_safe=False, requires=['requests'])
+    install_requires=[
+        'python-dateutil',
+        'tzlocal',
+        'requests',
+        'requests[security]'
+    ],
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
+    tests_require=[
+        'nose >= 1.3'
+    ],
+    project_urls={
+        'Bug Tracker': 'https://github.com/mailosaur/mailosaur-python/issues',
+        'Documentation': 'https://mailosaur.com/docs/email-testing/python/',
+        'Source Code': 'https://github.com/mailosaur/mailosaur-python',
+    },
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Operating System :: OS Independent',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: Implementation :: PyPy',
+        'Topic :: Software Development :: Quality Assurance',
+        'Topic :: Software Development :: Testing',
+        'Topic :: Software Development :: Libraries :: Python Modules',
+    ]
+)