Added a new TurboFilter: UserTurboFilter

appenders.xml is now well formed...

Classic version uses a JaninoEventEvaluator with a given default expression.
Access version uses a class extending JaninoEventEvaluator to implement the correct behavior.

modified script destination in assembly
added versions of logback modules and slf4j to be inserted into the scripts by maven

- Default configuration no longer calls BasicConfigurator.
- minor addition in pom.xml

Ongoing work on the intro.

removed tests jars from assembly

Updated configuration scripts and examples accondingly.
Other improvements to the documentation

Modified SyslogAppender so that events containing an exception result in multiple sendings to the server.
Updated test class.

minor changes to css/site.css

Added a reference to a snapshot repository. This prevents accidental deployment on release repository.

and not slf4j's logger class.

minor fixes

- SyslogAppender config (yet to be tested in real life)
- Modified SyslogAppenderTest, progress need to be done here, on testWithExceptions