Write page templates and canonical examples.

Conflicts:
	_data/tasks.yml
	_data/tutorials.yml
	docs/tasks/access-kubernetes-api/http-proxy-access-api.md
	docs/tasks/index.md
	docs/tutorials/index.md

_includes/templates/tutorial.md

@@ -0,0 +1,68 @@
+{% if overview %}
+
+{{ overview }}
+
+{% else %}
+
+{% include templates/_errorthrower.md missing_block='overview' purpose='states, in one or two sentences, the purpose of this document' %}
+
+{% endif %}
+
+
+* TOC
+{: toc}
+
+
+{% if objectives %}
+
+### Objectives
+
+{{ objectives }}
+
+{% else %}
+
+{% include templates/_errorthrower.md missing_block='objectives' heading='Objectives' purpose='lists the objectives for this tutorial.' %}
+
+{% endif %}
+
+
+{% if prerequisites %}
+
+### Before you begin
+
+{{ prerequisites }}
+
+{% else %}
+
+{% include templates/_errorthrower.md missing_block='prerequisites' heading='Before you begin' purpose='lists action prerequisites and knowledge prerequisites' %}
+
+{% endif %}
+
+
+{% if lessoncontent %}
+
+{{ lessoncontent }}
+
+{% else %}
+
+{% include templates/_errorthrower.md missing_block='lessoncontent' purpose='provides the lesson content for this tutorial.' %}
+
+{% endif %}
+
+
+{% if cleanup %}
+
+### Cleaning up
+
+{{ cleanup }}
+
+{% endif %}
+
+
+{% if whatsnext %}
+
+### What's next
+
+{{ whatsnext }}
+
+{% endif %}