Refactored python code into library.

setup.py

@@ -0,0 +1,20 @@
+#! /usr/bin/env python
+
+from setuptools import setup
+
+setup(
+    name='tabletmode',
+    version_format='{tag}',
+    setup_requires=['setuptools-git-version'],
+    author='Richard Neumann',
+    author_email='mail@richard-neumann.de',
+    python_requires='>=3.8',
+    packages=['tabletmode'],
+    scripts=['setsysmode', 'sysmoded'],
+    url='https://github.com/conqp/tablet-mode',
+    license='GPLv3',
+    description='Tablet mode switch for GNOME 3.',
+    long_description=open('README.md').read(),
+    long_description_content_type="text/markdown",
+    keywords='tablet mode tent convertible switch'
+)