Add a setup.py so we can import top-level directories.

requirements/edx/local.txt

 # Python libraries to install that are local to the edx-platform repo
+-e .
 -e common/lib/calc
 -e common/lib/capa
 -e common/lib/chem

setup.py

+from setuptools import setup, find_packages
+
+setup(
+    name="Open edX",
+    version="0.1",
+    install_requires=['distribute'],
+    requires=[],
+    # NOTE: These are not the names we should be installing.  This tree should
+    # be reorgnized to be a more conventional Python tree.
+    packages=[
+        "lms",
+        "cms",
+        "i18n",
+    ],
+)