Upgrade Cadence to 0.0.14.
Upgrade Arguable to 0.0.8.

Moved the default program into the main binary, so there is no more
additional default program. Got rid of the default program entirely so
that if no sub-command matches, a usage message is printed. This fits
with the behavior suggested and supported by Arguable 0.0.8.

Closes #146.
Closes #145.