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

- Update profunctors to version 5.3.
5.3 [2018.07.02]
----------------
* Generalize the types of `(#.)` and `(.#)`. Before, they were:
```haskell
(#.) :: (Profunctor p, Coercible c b) => (b -> c) -> p a b -> p a c
(.#) :: (Profunctor p, Coercible b a) => p b c -> (a -> b) -> p a c
```
Now, they are:
```haskell
(#.) :: (Profunctor p, Coercible c b) => q b c -> p a b -> p a c
(.#) :: (Profunctor p, Coercible b a) => p b c -> q a b -> p a c
```
* Drop support for GHC < 7.8.
* Add a `Profunctor` instance for `Data.Bifunctor.Sum`.

* Added a true Cotambara and Copastro construction for (co)freely generating
* Engaged in a fair bit of bikeshedding about the module structure for lesser used
* Added Prep and Coprep along with witnesses to the adjunctions
* UpStar and DownStar have become Star and Costar. Star is analogous to Kleisli,
* Moved Data.Profunctor.Collage to semigroupoids 5, and removed the semigroupoids
- initial commit