QUANTUM-13 Report coverage of tests separately.
QUANTUM-13 Report coverage of tests separately.

Previously, we had just been lumping everything together (and commonly
overwriting things, boo). The coverage of each unittest is now being
reported separately. To do this, 'istanbul coverage' is provided an
output directory (using '--dir'), and 'instanbul report' is pointed at
the correct json coverage file (using '--include') and told to dump the
result into the same output directory (again using '--dir').

cwgreene/quantum,cwgreene/quantum,cwgreene/quantum