start adding nginx stubs

setup.py

@@ -11,6 +11,7 @@ from setuptools import setup
 if os.path.abspath(__file__).split(os.path.sep)[1] == 'vagrant':
     del os.link
 
+
 def read_file(filename, encoding='utf8'):
     """Read unicode from given file."""
     with codecs.open(filename, encoding=encoding) as fd:
@@ -36,6 +37,7 @@ install_requires = [
     'pyasn1',  # urllib3 InsecurePlatformWarning (#304)
     'pycrypto',
     'PyOpenSSL',
+    'pyparsing>=1.5.5',
     'pyrfc3339',
     'python-augeas',
     'python2-pythondialog>=3.2.2rc1',  # Debian squeeze support, cf. #280
@@ -103,6 +105,8 @@ setup(
         'letsencrypt.client.plugins',
         'letsencrypt.client.plugins.apache',
         'letsencrypt.client.plugins.apache.tests',
+        'letsencrypt.client.plugins.nginx',
+        'letsencrypt.client.plugins.nginx.tests',
         'letsencrypt.client.plugins.standalone',
         'letsencrypt.client.plugins.standalone.tests',
         'letsencrypt.client.tests',