Setup directory structure

setup.py

@@ -125,6 +125,7 @@ docs_extras = [
 
 testing_extras = [
     'coverage',
+    'docker-py',
     'nose',
     'nosexcover',
     'tox',
@@ -171,6 +172,7 @@ setup(
 
     entry_points={
         'console_scripts': [
+            'compatibility = tests.compatibility.plugin_test:main [testing]',
             'letsencrypt = letsencrypt.cli:main',
             'letsencrypt-renewer = letsencrypt.renewer:main',
             'jws = letsencrypt.acme.jose.jws:CLI.run',

tests/__init__.py

@@ -0,0 +1 @@
+"""Let's Encrypt Tests"""

tests/compatibility/__init__.py

@@ -0,0 +1 @@
+"""Let's Encrypt Compatibility Test"""