allow selection of current user in filter queries fix #224

makes public filters much easier to design for users to get their own view of the system

Need refactoring and convention on meta-value. See note

Hi alan,

I test it with the spanish charts and you need to take care with ñ,á,é,í,ó,ú, etc.... make this change in the QueryGenerator.php FROM: value= trim(current_user->first_name.' '.$current_user->last_name); TO: value= html_entity_decode(trim(current_user->first_name.' '.$current_user->last_name));

Added enhancement label