Piwik stats plugin
Piwik plugin is a very simple and tiny plugin (4,2K uncompressed) to add piwik code to your GS pages.
Settings option (Settings->Piwik)
Web ID -> ID website from piwik
Token -> Token code generated by piwik to show visits graphic.
Stats URL -> Domain and directory where is piwik installation.
This plugin show visits graphic only when ID and token are configured.
Uncompress file in /plugins/ directory and activate it in control panel.