Minor doc tweaks

Author: Mark Gibbs

README.md

@@ -115,6 +115,6 @@ templates:
 ```
 
 The registration code needs to be in a location
-that will be imported into the Django process before any template tag attempts to use it. The example Django application
+that will be imported into the Django process before any model or template tag attempts to use it. The example Django application
 in the demo subdirectory achieves this through an import in the main urls.py file; any views.py would also be sufficient.
 

docs/simple_use.rst

@@ -55,6 +55,7 @@ templates:::
   {%plotly_item "SimpleExample"%}
 
 The registration code needs to be in a location
-that will be imported into the Django process before any template tag attempts to use it. The example Django application
+that will be imported into the Django process before any model or
+template tag attempts to use it. The example Django application
 in the demo subdirectory achieves this through an import in the main urls.py file; any views.py would also be sufficient.