boundless_training theme fixes for FOSS4G

[jodygarnett]

The boundless_training theme is great - and answers @pramsey request for a theme that "works" in a classroom setting.

Before using it at FOSS4G:

• CCbyA needs to be restored in the footer (this may be done in config.py - not sure)
• request: spoiler annotation so we can communicate the answers traditionally shown in the instructor notes

Example from point.rst:

   #. **Challenge:** Use this approach to rewrite the *Dynamic Styling* example.

      .. only:: instructor

         .. admonition:: Instructor Notes 

            Example available here :download:`point_example.css </files/point_example2.css>`

[eshon]

If you want spoiler annotation why not just build/share Instructor versions?

[jodygarnett]

Because I do not want them to see the answer until they want to check their work.

[eshon]

So how/where should they be placed?

[jodygarnett]

How about we adapt the example:

   #. **Challenge:** Use this approach to rewrite the *Dynamic Styling* example.

      .. only:: spolier

         .. admonition:: Spoiler

            Example available here :download:`point_example.css </files/point_example2.css>`

Q: Why .. only:: spoiler? So that ti can be avoid when generating PDF content? <-- not sure if we care?

[eshon]

This can't be automated, you'd have to go through the docs and change all references yourself when you generate the docs.

http://sphinx-doc.org/markup/misc.html?highlight=only#including-content-based-on-tags