build: add missing files to PyPI distribution (v3.3.0) (#140)

The existing PyPI distribution (edx-codejail 3.2.0) was
missing several files that made it unsuitable for installation
by edx-platform:

* It was missing root scripts: proxy_main.py and memory_stress.py.
* It was missing the apparmor-profiles and sudoers-files directories.
* It wasn't missing any Python modules under codejail, but *if* any
  sub-packages had been added to codejail, they would have been
  omitted from the distribution. This could have bitten someone in the future.

To fix, we modify setup.py and add a MANIFEST.in, in line with the
pattern established by the cookiecutter repo:

https://github.com/openedx/edx-cookiecutters/blob/master/python-template/%7B%7Bcookiecutter.placeholder_repo_name%7D%7D/setup.py

This wasn't affecting edx-platform because edx-platform currently
does a GitHub-based editable installation (`-e git+https://...`) for
codejail. However, we'd like to move away from those editable
installations as a they are slow and cannot be kept up-to-date
with `make upgrade`.

Bump from 3.2.0 to 3.3.0.

.gitignore

@@ -7,6 +7,7 @@ coverage.xml
 htmlcov
 reports/*
 .tox/*
+/dist
 
 # Editor detritus
 *~

MANIFEST.in

@@ -0,0 +1,5 @@
+include LICENSE.txt
+include README.rst
+include requirements/*
+include apparmor-profiles/*
+include sudoers-file/*

codejail/__init__.py

@@ -1,3 +1,3 @@
 """init"""
 
-__version__ = '3.2.0'
+__version__ = '3.3.0'

setup.py

@@ -2,7 +2,7 @@
 import os
 import re
 
-from setuptools import setup
+from setuptools import find_packages, setup
 
 with open('README.rst') as readme:
     long_description = readme.read()
@@ -36,7 +36,12 @@ def get_version(*file_paths):
     author='edX',
     author_email="[email protected]",
     url='https://github.com/openedx/codejail',
-    packages=['codejail'],
+    scripts=['proxy_main.py', 'memory_stress.py'],
+    packages=find_packages(
+        include=['codejail', 'codejail.*'],
+        exclude=["*tests"],
+    ),
+    include_package_data=True,
     install_requires=['six'],
     zip_safe=False,
     classifiers=[