Add setup.py and make cli easily installable via entry_points

setup.py

@@ -0,0 +1,25 @@
+from setuptools import setup
+
+setup(
+    name='identicon',
+    version='1.0.0',
+    author='Kristóf Tóth',
+    author_email='mrtoth@strongds.hu',
+    description='CLI tool and library to generate OpenSSH style randomart identicons for arbitrary data.',
+    url='https://git.strongds.hu/mrtoth/identicon',
+    packages=['identicon'],
+    entry_points={
+        'console_scripts': ['identicon=identicon.cli:main'],
+    },
+    install_requires=[
+        'blake3',
+        'click',
+    ],
+    extras_require={
+        'dev': [
+            'pytest',
+            'pylint',
+            'rope',
+        ],
+    },
+)