Add templating folder and stub files/templates.

templating/README.md

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+This folder contains the templates and templating system for creating the spec.
+We use the templating system Jinja2 in Python. This was chosen over other
+systems such as Handlebars.js and Templetor because we already have a Python
+dependency on the spec build system, and Jinja provides a rich set of template
+operations beyond basic control flow.
+
+Installation
+------------
+```
+ $ pip install Jinja2
+```
+
+Running
+-------
+To build the spec:
+```
+ $ python build.py
+```
+
+This will output ``spec.rst`` which can then be fed into the RST->HTML
+converter located in ``matrix-doc/scripts``.

templating/build.py

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+from jinja2 import Environment, FileSystemLoader
+import json
+
+def jsonify(input):
+    return json.dumps(input, indent=4)
+
+env = Environment(loader=FileSystemLoader("templates"))
+env.filters["jsonify"] = jsonify
+
+example = {}
+with open("../example.json", "r") as f:
+    example = json.loads(f.read())
+event = {}
+with open("../event_schema.json", "r") as f:
+    event = json.loads(f.read())
+
+template = env.get_template("events.tmpl")
+print template.render(example=example, event=event)

templating/templates/events.tmpl

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+{{event.type}}
+--------------
+Summary: {{event.summary}}
+Type: {{event.parent}}
+Description: {{event.desc}}
+JSON Format: {{event.content | jsonify}}
+Example: {{example.content | jsonify}}