Cron mode: introduce cliKey and allow launch from typo3/cli_dispatcher.php

A new menu for the BE with some infos/log about CRON mode. 

improve output messages and log for updating process

keywords for static/dynamic sites....

for each keyword enable or disable image fetching...

documentation in italian language

static/dynamic sites: add code to fetch full news and import in DB (long text, news type= internal)

static/dynamic sites (not engines!) add a field to exclude undesired  keywords

static/dynamic sites (not engines!) add a field to relate news fetched to one or more news category