Add ebola dataset from intro course.

[jarvisc1]

No description provided.

[jarvisc1]

No rush on this, was just seeing how it works. Good instructions!

If you're happy then I can start to port the Shiny course data over to this.

I think some wrapper functions could be useful to allow the user to run

get_course_data("shiny") and then get_data is is used multiple times. I see you have a group identifier but this is within and across groups.

[aspina7]

Hold up lets not merge this yet. We should move the handbook data first and then if the course dataset is substantially different it becomes t1v2 - and we should be able to trace how the changes were made then.
Re courses no need to add a wrapper (get_data already able to handle multiple files) - would just need to update as described in #3.
users would then run e.g. get_data(usage = "shiny")

[aspina7]

the original is from the {outbreaks} package and was edited, so would need to be acknowledged here.