Added path to code to data docs

Author: TomHAnderson

.documentation/data.rst

@@ -1,6 +1,8 @@
 Data Module
 ===========
 
+`~/src/app/data <../src/app/data>`_
+
 The data module is a top level directory and holds the schema (models/entities) and services (repositories)
 for data consumed by the application.