Patch Version 1.0.9 : Allow template save their own parameters

Joomla template configuration save the setting into a file called "params.ini" file present in the template directory.
As all websites share the files and folders, when a website change the template parameters, it was modiified and applicable for all the websites.

To allow each website having its own "params.ini", this patch add the site identifier in the name of the parameter file.