update on RDFa wiki

Thanks to the tireless CC team:

 > 1. Please enable forcing lower-case page names for the wiki.

Not done yet, but this seems like a microformats.org-specific hack.

 > 2. Hide MediaWiki Talk links.

done

 > 3. Enable image file uploading.

done

 > 4. Figure out how we can embed YouTube Flash-based videos on the wiki.

done:

> <videoflash>4lhyH5TsuPg</videoflash>
> <videoflash type="googlevideo">1811233136844420765</videoflash>
> <videoflash type="dailymotion">7fiHlJPCjcqK73xbb</videoflash>
> <videoflash type="sevenload">Eh4mjir</videoflash>
> <videoflash type="revver">138657</videoflash>

> The first one is for YouTube and the string is the video ID.  I guess
> for YouTube you don't need to specify type="".  For more information
> see:
> 
> http://www.mediawiki.org/wiki/Extension:VideoFlash

-Ben