Aggregate Boosters

[scottkurz]

We could consider an aggregate "booster" dependency analogous to the EE or MP aggregate dependencies (that transitively depend on all the individual APIs).

This would not be as useful for building a minimal or "right-sized" server, but would be more convenient when typing by hand than adding boosters one-by-one.

One point to consider: the "platforms" have already ensured that the API levels fit together. But to the extent boosters pull in test dependencies, which are entirely a creation of the boost project, it would be our job to ensure the test dependencies also fit well together (i.e. how to aggregate them).