Add support for AlignEquals

Addresses fabpot/PHP-CS-Fixer#642 - AlignEquals
Actually, I think you can help me with that.

IMHO, this is a fixer that change only cosmetics, no token is change, no token is introduced or removed. However, its effects may be rolled back by other fixers, fixing something more relevant.

Is it reasonable? Anyway, I am adding the comment and committing.