Simplify urlname generating
Simplify urlname generating

There is no need to rebuild every ancestors slug since we already have the parents urlname we can append the slug to.

robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,AlchemyCMS/alchemy_cms,mamhoff/alchemy_cms,mamhoff/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,mamhoff/alchemy_cms