- cleaned up config files so that "level" is an XML attribute and not
  an XML element

- updated Gmail related examples

- LBCLASSIC-100

  Evaluators are now wired into an appender automatically (implicit
  rules) without the help of EvaluatorAction. EvaluatorAction is now
  only needed for global evaluator elements.

  It follows that name attribute is necessary only for global
  evaluators. Embedded evaluators no longer need a name.

  EvaluatorAction has been modified to accept evaluators of any type
  and not just JaninoEvaluators.