[Catalog-sig] Performing exact matches in Cheeseshop URLs

["Martin v. Löwis"]

> Currently the EasyInstall doc says "Individual project version pages' URLs 
> must be of the form base/projectname/version, where base is the package 
> index's base URL." 

Ok, I have changed it in r444. The original search semantics of that is
still available in /pypi?:action=index&name=PyXML

Regards,
Martin