The traceur transpiler is nice and full-featured, but it has some major

problems with recent chrome updates. This change switches us over to the 6to5

transpiler.
6to5 is unfortunately missing a couple Array features (Array.from and

Array.find), and the handling of this in fat-arrow functions is slightly

different. The bulk of this change is actually cleaning up those issues.

Flipped around between the calendar and user detail views. Everything seemed to

work correctly.