Django: more explicit instructions, plus markdown

diff --git a/django/.gitignore b/django/.gitignore
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+/README.html

diff --git a/django/README b/django/README
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-/mit/__init__.py contains some useful functionality for Django applications
-running at MIT, particularly on the scripts.mit.edu platform
-
-- zephyr(msg, clas, instance, rcpt) sends a zephyr (by shelling out to zwrite).
-  This may be useful for debugging or logging
-- ScriptsRemoteUserMiddleware and ScriptsRemoteUserBackend work together to
-  auto-create users from certificates on scripts.mit.edu-hosted sites. Account
-  details are automatically retrieved from LDAP.
-- scripts_login is a view that tries to log users into a site using certs.
-
-To use them, you'll probably want to symlink or copy the "mit" directory into
-your project, add it to your apps list, and modify your middlewares and auth
-backend appropriately. Do *not* link this (the "django" directory) into your
-app; it's reasonably likely to break your "import django.foo" statements.
-
-This code is descended from work on Remit (https://remit.scripts.mit.edu/trac/)
-and the ASA DB (https://asa.scripts.mit.edu/trac/); current and past bugs are
-likely to be filed there.

diff --git a/django/README.md b/django/README.md
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+`/mit/__init__.py` contains some useful functionality for Django applications
+running at MIT, particularly on the scripts.mit.edu platform
+
+- `zephyr(msg, clas, instance, rcpt)` sends a zephyr (by shelling out to
+  zwrite).  This may be useful for debugging or logging
+- `ScriptsRemoteUserMiddleware` and `ScriptsRemoteUserBackend` work together to
+  auto-create users from certificates on scripts.mit.edu-hosted sites. Account
+  details are automatically retrieved from LDAP.
+- `scripts_login` is a view that tries to log users into a site using certs.
+
+To use them, you'll probably want to symlink or copy the `mit` directory into
+your project, add it to your apps list, and modify your middlewares and auth
+backend appropriately. Do *not* link this (the `django` directory) into your
+app; it's reasonably likely to break your `import django.foo` statements.
+
+This code is descended from work on
+[Remit](https://remit.scripts.mit.edu/trac/) and the [ASA
+DB](https://asa.scripts.mit.edu/trac/); current and past bugs are likely to be
+filed there.
+
+Using certificate authentication
+--------------------------------
+
+1. Copy the `mit` directory into your project
+2. Update settings.py
+   - Add `mit.ScriptsRemoteUserMiddleware` to the end of `MIDDLEWARE_CLASSES`
+   - Add `mit.ScriptsRemoteUserBackend` to the beginning of
+     `AUTHENTICATION_BACKENDS`
+3. Add `url(r'^accounts/login/',  'mit.scripts_login',  name='login', )` to
+   your `urls.py`. This causes `@login_required` and similar mechanisms to
+   automatically redirect users to port 444 and log them in with certificates.
+