Add dev_int.py config for testing course listings by subdomain

lms/envs/dev_int.py

+"""
+This enables use of course listings by subdomain. To see it in action, point the
+following domains to 127.0.0.1 in your /etc/hosts file:
+
+  berkeley.dev
+  harvard.dev
+  mit.dev
+
+Note that OS X has a bug where using *.local domains is excruciatingly slow, so
+use *.dev domains instead for local testing.
+"""
+from .dev import *
+
+MITX_FEATURES['SUBDOMAIN_COURSE_LISTINGS'] = True
+
+COURSE_LISTINGS = {
+    'default' : ['BerkeleyX/CS169.1x/2012_Fall',
+                 'BerkeleyX/CS188.1x/2012_Fall',
+                 'HarvardX/CS50x/2012',
+                 'HarvardX/PH207x/2012_Fall'
+                 'MITx/3.091x/2012_Fall',
+                 'MITx/6.002x/2012_Fall',
+                 'MITx/6.00x/2012_Fall'],
+
+    'berkeley': ['BerkeleyX/CS169.1x/2012_Fall',
+                 'BerkeleyX/CS188.1x/2012_Fall'],
+
+    'harvard' : ['HarvardX/CS50x/2012'],
+
+    'mit'     : ['MITx/3.091x/2012_Fall',
+                 'MITx/6.00x/2012_Fall']
+}