gctools: added sys.getrefcount, switched back to backrefs (oops), added a wait for pending requests,  and added finalizers.png
gctools: added sys.getrefcount, switched back to backrefs (oops), added a wait for pending requests,  and added finalizers.png

cherrypy/cheroot,cherrypy/cherrypy,cherrypy/cherrypy,Safihre/cherrypy,Safihre/cherrypy