Added Scenario "XML parsing" and untangle lib.

docs/contents.rst.inc

@@ -54,6 +54,7 @@ different scenarios.
    scenarios/speed
    scenarios/scientific
    scenarios/imaging
+   scenarios/xml
 
 
 Shipping Great Code

docs/scenarios/xml.rst

@@ -0,0 +1,34 @@
+XML parsing
+===========
+
+untangle
+--------
+
+`untangle <http://0chris.com/untangle>`_ is a simple library which takes
+an XML document and returns a Python object which mirrors the nodes and
+attributes in its structure.
+
+For example, an xml file like this:
+
+.. code-block:: xml
+
+    <?xml version="1.0"?>
+    <root>
+        <child name="child1">
+    </root>
+
+can be loaded like this:
+
+.. code-block:: python
+
+    import untangle
+    obj = untangle.parse('path/to/file.xml')
+
+and then you can get the child elements name like this:
+
+.. code-block:: python
+
+    obj.root.child['name']
+
+untangle also supports loading XML from a string or an URL.
+