Create and install src as Python package

{{ cookiecutter.repo_name }}/requirements.txt

@@ -1,3 +1,7 @@
+# local package
+-e .
+
+# external requirements
 click
 Sphinx
 coverage

{{ cookiecutter.repo_name }}/setup.py

@@ -0,0 +1,10 @@
+from setuptools import find_packages, setup
+
+setup(
+    name='src',
+    packages=find_packages(),
+    version='0.0.1',
+    description='{{ cookiecutter.description }}',
+    author='{{ cookiecutter.author_name }}',
+    license='{% if cookiecutter.open_source_license == 'MIT' %}MIT{% elif cookiecutter.open_source_license == 'BSD-3-Clause' %}BSD-3{% endif %}',
+)