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ADF Error handling new lessons

1) When using a custom error handler (in DataBindings.cpx ErrorHandlerClass="blah") in a main project that contains in a shared libs the main projects error handler will be used not the shared libs. So it is best not to override the error handler in the main project.

2) ErrorHandler for unexpected errors:
http://blogs.oracle.com/jdevotnharvest/entry/extending_the_adf_controller_exception_handler

3) action-listener in faces-config.xml can be overriden.
http://www.techbrainwave.com/?p=3

4) JSF 2 error handler:
http://jugojava.blogspot.com/2010/09/jsf-2-exception-handling.html
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