bugfixes: LL::Search doesn't have access to is_lab_staff() method of LIMS::Base so had to create own version; {QUERY_STRING} not passed in 'post' method in request form upload, so substituted CGI, needed 'tkn' param addition to FileUploader default.tt
exempted lab staff from local network restriction in search function; moved resources/menu file uploads and request forms to local/<centre> config files
changed method of determining timeout in _authen_config() from examination of user.designation to whether user has the do_admin function, so user can keep descriptive designation and still get admin timeout setting
