Fixed a bug

We now construct the Object array to place the arguments of the parametrized logging only when the TurboFilters have been called.
This makes the cost of not logging less expensive of about 20 nanos per request.
The isDebugEnabled methods (and related isXXXEnabled() ) now call the TurboFilters before returning their result.

PropertySetter manages FilterReply enums.
Test case now tests two things: the precise FilterReply case, and a generic enum case.

- various other improvements to the docs 

Better fail check in EvaluatorFilter

Updated the assembly file

ongoing work

moving manual/images

ongoing work on the documentaiton

Moved all html docs in a "pages" directory. They are now filtered to display values of variables like ${project.version}.
The site.css and print.css files have also been moved to allow a more comfortable edition of the html docs.

doc improvements