add some default values for meta information
add some default values for meta information

I think we can do better on the tiddler description and should maybe
use SiteInfo for the tiddlers url but this will do for time being.

TiddlySpace/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace,FND/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace