Release Name: 0.4.0

Notes:
* August 21st, 2008: Fourth public release 0.4.
  * New middleware, Rack::Deflater, by Christoffer Sawicki.
  * OpenID authentication now needs ruby-openid 2.
  * New Memcache sessions, by blink.
  * Explicit EventedMongrel handler, by Joshua Peek.
  * Rack::Reloader is not loaded in rackup development mode.
  * rackup can daemonize with -D.
  * Many bugfixes, especially for pool sessions, URLMap, thread safety
    and tempfile handling.
  * Improved tests.
  * Rack moved to Git.



Changes: