Settings interface for configuring exception handling related settings.
unexpectedExceptionDisplay (defaults to SHOW_EXCEPTION_PAGE) - Determines how exceptions are displayed to the developer or user
throwExceptionOnMissingResource (defaults to true) - Set to true to throw a runtime exception if a required string resource is not found. Set to false to return the requested resource key surrounded by pairs of question mark characters (e.g. "??missingKey??")
@author Jonathan Locke
@author Chris Turner
@author Eelco Hillenius
@author Juergen Donnerstag
@author Johan Compagner
@author Igor Vaynberg (ivaynberg)
@author Martijn Dashorst
@author James Carman