Got rid of the "deploy" branch.

In practice we're just not using it, and it's making deploying new stuff
a bit harder. So we'll fly by the seat of our pants more now.

fabfile.py

@@ -10,7 +10,7 @@
 env.virtualenv = env.deploy_base
 env.code_dir = env.deploy_base.child('src')
 env.git_url = 'git://github.com/django/djangoproject.com.git'
-env.default_deploy_ref = 'origin/deploy'
+env.default_deploy_ref = 'origin/master'
 
 def full_deploy():
     """
@@ -88,4 +88,4 @@ def southify(app):
     time you do a deploy on app that's been newly southified.
     """
     managepy('migrate %s 0001 --fake' % app)
-    managepy('migrate %s' % app)
+    managepy('migrate %s' % app)