Package the python tools so they can be installed more easily

This puts the python tools into a python package with a setup.py for installation.
This also updates requirements.txt which was missing "requests" and which depended on a version of "Markdown" which doesn't work with modern Python versions.

README.md

@@ -142,14 +142,14 @@ staged in git's index you can pass the `--staged` switch (this is mostly good fo
 You'll need a couple of dependency libraries. You can get them with the following command:
 
 ```shell
-$ pip install -r requirements.txt
+$ pip install ./
 ```
 
 It's best to do that within a [virtualenv](http://virtualenv.readthedocs.org/en/latest/).
 Then you can run the command:
 
 ```shell
-$ ./check_advisories.py
+$ check_advisories
 Checked 3 files. Found 0 errors.
 ```
 

requirements.txt

@@ -1,4 +1,5 @@
 PyYAML==5.4
-Markdown==2.5.2
+Markdown==3.3.7
 python-dateutil==2.4.2
 schema==0.7.2
+requests

setup.py

@@ -0,0 +1,41 @@
+# Always prefer setuptools over distutils
+from setuptools import setup, find_packages
+# To use a consistent encoding
+from codecs import open
+from os import path
+
+here = path.abspath(path.dirname(__file__))
+
+with open(path.join(here, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
+
+setup(
+    name='foundation_security_advisories',
+    version='1.0.0',
+    description='Tools supporting the Mozilla Foundation Security Advisories',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
+    url='https://github.com/mozilla/foundation-security-advisories',
+    author='Tom Ritter',
+    license='MPL-2.0',
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: System Administrators',
+        'Topic :: Security',
+        'License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)',
+        'Programming Language :: Python :: 3'
+    ],
+    packages=find_packages(exclude=['contrib', 'docs', 'tests']),
+    install_requires=[
+        'PyYAML==5.4',
+        'Markdown',
+        'python-dateutil==2.4.2',
+        'schema==0.7.2',
+        'requests'],
+    entry_points={
+        "console_scripts": [
+            "update_hof = foundation_security_advisories.update_hof:main",
+            "check_advisories = foundation_security_advisories.check_advisories:main"
+        ]
+    }
+)