Safe reimplementation of QuickCheck's core; profiling libraries

 QuickCheck-safe reimplements the quickCheck functionality with a pure
 interface and a very small trusted base (see Test.QuickCheck.Safe.Trusted).
 .
 * uses the existing Arbitrary instances
 * implemented features: testing, result minimization (i.e., shrinking)
 * missing features: expected failures, label frequencies, coverage
 .
 The package is targeted at users who want to leverage SafeHaskell for
 sandboxing.
 .
   >>> putStr $ quickCheck (inventQCGen ()) (\x -> length (x :: [()]) < 10)
   *** Failed! Falsifiable (after 18 tests and 3 shrinks):
   [(),(),(),(),(),(),(),(),(),(),(),(),(),(),()]
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.