Rename constructors and related parser strings of LongListAlign

[sorki]

The documentation of these doesn't quite reflect the implementation and it seems to cause some confusion.

This patch tries to address it by renaming LongListAlign constructors to better reflect what they do and fix their documentation in stylish-haskell.yaml.

There is no change in functionality but it introduces a breaking change for users using the Haskell interface. It also adds a (lousy) concept of config option deprecation in form of documenting the deprecated variants in favor of new names.

Related to #462