unit-based requirements

[npfoss]

(this is on branch change-year, but that will soon go into master and I don't want to forget about this bug)

Interesting bug in course 11:

• Urban field experience is not actually satisfied, I think, and the progress is "N/A%".
• Looks like there's a weird parse putting a | before the units-based requirement
• also the progress bar isn't quite right, I think

[georgiashay]

Looks like fireroad is returning true for the fulfilled property of the Urban Field Experience requirement. Looking at http://catalog.mit.edu/degree-charts/planning-course-11/, it appears that Urban Field Experience is optional, so that would make sense (The N/A% indicates the maximum progress is 0, i.e. optional). We would need to figure out how we want such optional requirements to display - maybe a greyed out icon or different icon altogether?

As for the |, it was intended to separate the title and requirement (so like Concentration | 78 units) but this particular requirement doesn't have a title. Should be a simple fix.

[npfoss]

Ah it makes sense why that's happening now, thanks!