adding djangorest_alchemy to path for example project

examples/manage.py

@@ -3,6 +3,8 @@ import os
 import sys
 
 if __name__ == "__main__":
+    sys.path.append(os.path.abspath(os.path.join(__file__, '..')))
+
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
 
     from django.core.management import execute_from_command_line