popup (overlib) plugin patch

Hi,

I'm using overlib (http://www.bosrup.com/web/overlib) with the builtin popup 
smarty plugin.
As the current plugin didn't allowed me to use CSS to control popups look, i 
did modify it to take the following new options :

commands without parameter:
- CSSOFF
- CSSSTYLE
- CSSCLASS

commands with parameter :
- FGCLASS
- BGCLASS
- TEXTFONTCLASS
- CAPTIONFONTCLASS
- CLOSEFONTCLASS

attached is the diff with cvs file lib/plugins/function.popup.php

A big thanks to all smarty devs, i love this stuff :)

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36a37,41
>             case 'fgclass':
>             case 'bgclass':
>             case 'textfontclass':
>             case 'captionfontclass':
>             case 'closefontclass':
74a80,82
>             case 'cssoff':
>             case 'cssstyle':
>             case 'cssclass':