Replace inner `cadence` function in `README.md`.

Some of the `README.md` examples were still using the old inner
function.
Merge branch `readme` into `master`.
Update `t/sizes` minifcation report for Bash 3.

The `t/sizes` minification report now works on Bash 3.

Closes #53.
Add `.js` suffix to test file names.

Added `.js` suffix to test file names in accordance with the new Proof
test file naming conventions.

Closes #54.
Merge branch `tidy` into `master`.