Align and Zip type-classes from the common Semialign ancestor; documentation

 This Haskell library implements the 'Semialign' class, which represents a
 generalized notion of "zipping with padding" that combines structures without
 truncating to the size of the smaller input.
 .
 It turns out that the 'zip' operation fits well the 'Semialign' class,
 forming a lattice-like structure.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.