manage.py: New file.

To bring the project in line with modern Django apps.

www/manage.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+if __name__ == "__main__":
+    www_path = os.path.abspath(os.path.dirname(sys.argv[0]))
+    if www_path not in sys.path:
+        sys.path.append(www_path)
+
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "conservancy.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)