- Cosmetic: replace tabs with blanks, strip trailing white space,
and update copyright headers with spec-cleaner.

- Update bifunctors to version 5.5.3.
5.5.3 [2018.07.04]
------------------
* Make `biliftA2` a class method of `Biapplicative`.
* Add the `traverseBia`, `sequenceBia`, and `traverseBiaWith` functions for
traversing a `Traversable` container in a `Biapplicative`.
* Avoid incurring some dependencies when using recent GHCs.

* dded several Arrow-like instances for Tannen so we can use it as the Cayley
* Added Data.Bifunctor.TH, which permits TemplateHaskell-based deriving
* Inverted the dependency on semigroupoids. We can support a much wider array of base
- correct licence to BSD-2-Clause
- initial commit