Changelog for hobbits-1.2.4

1.2.3 -> 1.2.4 - exposed NuMatchingObj to the user - updated cabal file to handle newer versions of GHC - added a number of NuMatching and Liftable instances 1.2.2 -> 1.2.3 - Renamed Cl and unCl to Closed and unClosed, respectively - Moved mkClosed to Internal/Closed.hs - Added the Closable typeclass - Added clApplyCl 1.2.1 -> 1.2.2 - Added NuMatching and Liftable instances for the unit type 1.2 -> 1.2.1 - Renamed Data.Type.HList to Data.Type.RList - Now using DataKinds to represent right-lists of types 1.1.1 -> 1.2 - Added Closed type - Updated to work with stack and also ghc-7.10