[python] fix "File 'setup.py' not found" error in readthedocs.org

Builds of python package documentation on readthedocs.org stopped working because of
"Directory u'.' is not installable. File 'setup.py' not found."

This error was introduced in feab21e.

python/requirements.readthedocs.txt

@@ -0,0 +1,5 @@
+# Used solely for building documentation on readthedocs.org
+# Use this file by running "$ pip install -r requirements.readthedocs.txt"
+# http://docs.readthedocs.io/en/latest/faq.html#can-i-document-a-python-package-that-is-not-at-the-root-of-my-repository
+
+./python

python/requirements.txt

@@ -1,7 +1,6 @@
 # Used for when working from a virtualenv.
 # Use this file by running "$ pip install -r requirements.txt"
 
-.
 pytest
 mock
 sphinx

python/setup.py

@@ -17,7 +17,9 @@
     'marshmallow',
     'requests',
     'requests-toolbelt',
-    'six'
+    'six',
+    'configparser',
+    'munch',
 ]
 
 __description__ = "Python client for copr service."