show internal error page on unhandled exceptions
------------------------------------------------

         Key: CONTINUUM-778
         URL: http://jira.codehaus.org/browse/CONTINUUM-778
     Project: Continuum
        Type: Sub-task

  Components: Web interface  
    Versions: 1.0.3    
    Reporter: Carlos Sanchez
     Fix For: 1.1


It's possible to setup a servlet filter or something similar that maybe webwork 
already has (Struts has it) to catch all unhandled exceptions, log them to the 
log file and redirect the user to a "internal error" page.

Related to this we should make ContinuumException a RuntimeException, don't 
catch it in the web layer and let the previous mechanism do it. We'll save a 
lot of exception handling code not needed.
Note that this is only for system exceptions, eg. if database is down, and not 
model exceptions, eg. when looking up by id it the record doesn't exist.

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