Fix for issue #7 (configuration examples).

Fixed typos and added single quote error messages.
Fixed another typo in English configuration file.
Add ability to set an accesskey for form submission.
Fixed minor typo in comment.
Add additional class to be used as CSS hook.

Allows to style event and filter messages differently.
Fix example code for Symphony 2.3 and later.
Best Symphony practice is to read params from XML.
Read even more params from XML.
XHTML requires a surrounding block level element.
Multiple Members sections: hidden input elements.
Add autocomplete attribute to some password fields