* was already done, but inconsistently
* this style follows homebrew Formula
* covers user-facing messages, test titles, comments
* some related minor orthography is included, such
as the consistent spelling of our project name as
"homebrew-cask"
* grammar nits
Just getting started of course, but this piggy backs on Homebrew's
testing strategy to give us a platform for a fully featured test suite.
Neato!
And the tests provide value right away, as I added some better error
handling to `Cask.load`.
Big things ahead. Just you wait.