HypothesisTests

[jverzani]

Is there a reason that the HypothesisTests package isn't a dependency, so that its similarly named types (e.g., OneSampleTTest) could be used in the same session more easily? That package pulls in a few more things than PowerAnalyses, but it seems modest (maybe just Combinatorics)?

I could try working out a PR if you weren't opposed to the modification.