Fixing django-sample (#413)

* [django-sample] Fixing bugs and removing useless imports

* [django-sample] Adding requirements

* [django-sample] Adding make file

* Adding test to Makefile
diff --git a/samples/django_sample/manage.py b/samples/django_sample/manage.py
index b2f07f1..4146caa 100755
--- a/samples/django_sample/manage.py
+++ b/samples/django_sample/manage.py
@@ -2,7 +2,7 @@
 from __future__ import absolute_import
 from django.core.management import execute_manager
 try:
-    from . import settings # Assumed to be in the same directory.
+    import settings # Assumed to be in the same directory.
 except ImportError:
     import sys
     sys.stderr.write("""Error: Can't find the file 'settings.py' in the