Merge branch 'master' of git@github.com:wycats/merb-core

* 'master' of git@github.com:wycats/merb-core:
  Added spec for the route matcher testing regexp routes. [#386]
  Add Merb.started? alias for Merb.started reader.
  Add reader for @started flag which shows when Merb environment is started.
  better log message
  rescue excpetions in Worker thread, log them and then restart the work queue
  Router now can do 
  r.match("/this/old/url").redirect("/where/this/resides/now").
  Refactor Merb::Test::RequestHelper and introduce build_request helper.
  spoke too soon.
  we actually don't need to log this at all as its logged latert in the 
  _benchmarks
  Update link to wiki page on Rack in exception.
  Add link to Rack page at wiki to Controller not found exception. This confuses 
  people a lot.
  Log namespaced controller name when it's class is not found.
  I will test first next time, I promise.
  Tell what's actually started when Dispatcher begins to handle request.
  Fixed typo in yet another exception message.
  Log an info message when route fixation actually happens. Those heavily using 
  Flash will find it helpful.
  Log a warning if controller class cannot be found.
  A bit more verbose exception message when route does not specify a controller.

    Documentation: add deprecation warning to AbstractController. Manually applied 
  patch from dstar.
  Increase header level on sub-headers of Filters in AbstractController