class evals improvements

[cjquines]

at minimum:

• separate per term (combining fall/spring + iap/summer hours is wrong, see language classes)

will push a temporary fix, but a more correct fix would involve editing the compiler (which, is, for some reason, a jar?)

[cjquines]

pushed 78dc162a7ec67b27f20d0c7657b327f9509e654a