Use manage.py migrate to fix Django 1.9 compatibility

Supports 1.8 too but skips one of the steps there, oh well

package.json

@@ -105,7 +105,7 @@
         "c9.ide.recentfiles": "#7c099abf40",
         "c9.ide.remote": "#301d2ab519",
         "c9.ide.processlist": "#2b12cd1bdd",
-        "c9.ide.run": "#f03e4b018e",
+        "c9.ide.run": "#e39777d09b",
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#a1b39e0ac4",
         "c9.ide.save": "#29fce5e9b6",