Add ASGI support

Then in your project's `asgi.py` file use this:

```python
from configurations.asgi import get_asgi_application

application = get_asgi_application()
```

configurations/asgi.py

@@ -0,0 +1,14 @@
+from . import importer
+
+importer.install()
+
+try:
+    from django.core.asgi import get_asgi_application
+except ImportError:  # pragma: no cover
+    from django.core.handlers.asgi import ASGIHandler
+
+    def get_asgi_application():  # noqa
+        return ASGIHandler()
+
+# this is just for the crazy ones
+application = get_asgi_application()