Create description text under Primers and Instructor Guides

[stephwright]

Put text in blue boxes explaining primers & instructor guides

[stephwright]

Primers: The primers are text-based materials designed for people to read at their own pace and pick and choose the topics they want to read concerning open data.

[stephwright]

Instructor Guides: These are train-the-trainer type materials on open data. They are meant as a resource to allow educators to lead workshops for learners where each of the modules is interactive and customizable to meet the needs of a variety of audiences.