we can now refer to a dict of questions (currently located in the main app) through a
meta tag in the markdown. If a quiz is assigned and is know by the global environment,
the template renders a quiz after the content of the markdown document page.
Link anchors will need to be added.

possible issues:
* needing more than one correct answer is currently out of the model
* where to redirect after submitting the questionnaire form, do we send back to the quiz?
* defining a ratio of number of questions vs number of needed correct answers still
needs to be built in before we award a badge