[Namespaces are all lowercase](http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Namespace_Names#Namespace_Names), if that is what you are getting at.  The supply_demand and action_building namespaces are nested inside of cyclus (ie, "cyclus::supply_demand").  This doesn't match the file system directory structure yet because that will be covered by the file names PR, if we choose to reorganize the directory layout...which I think that we should.