auto-scrubbing and const-time-eq memory chunk abstraction; profiling libraries

 SecureMem is similar to ByteString, except that it provides a memory
 chunk that will be auto-scrubbed after it run out of scope.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.