Update jflow doc

docs/jflow_format.html

@@ -90,6 +90,7 @@
 │   ├── extparsers/
 │   ├── __init__.py
 │   ├── formats.py   [ file where to add new jflow formats ]
+│   ├── rules.py
 │   └── types.py
 ├── applications.properties
 └── README</code></pre>

docs/jflow_type.html

@@ -89,6 +89,7 @@
 │   ├── extparsers/
 │   ├── __init__.py
 │   ├── formats.py
+│   ├── rules.py
 │   └── types.py   [ file where to add new jflow types ]
 ├── applications.properties
 └── README</code></pre>