JSON encoding of ekg metrics; profiling libraries

 Encodes ekg metrics as JSON, using the same encoding as used by the
 ekg package, thus allowing ekg metrics to be served by other HTTP
 servers than the one used by the ekg package.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.