Reduce coding burden for Part 01

[charlesfrye]

@spopham:

So the one high-level comment that I got repeatedly was just that people were struggling a fair amount with the coding in the first half of the course. I did remind them many times that they could go back to the tutorial notebooks and copy sections of code to adapt to their needs, but I'm not sure this message stuck. So overall, I think the long-term solution to that problem would be to adapt the first half of the course to be more like the second half of the course, where there is less coding but more questions to answer and parameters to tweak.

[charlesfrye]

Some of this was done in c096909, which added templates for many questions and generally cut back on coding portions.

More could be done to make this portion of the course more like Part 02, with more of an emphasis on fiddling with parameters interactively and developing intuition by watching animations, so I'll leave it open as a 2019spring goal.