EJAB-739 and EJAB-751 improvements

Files:
modified: /trunk/src/mod_pubsub/node_default.erl (try)
modified: /trunk/src/mod_pubsub/node_pep.erl (try)
modified: /trunk/src/mod_pubsub/node_club.erl (try)
modified: /trunk/src/mod_pubsub/node_buddy.erl (try)
modified: /trunk/src/mod_pubsub/node_zoo.erl (try)
modified: /trunk/src/mod_pubsub/gen_pubsub_node.erl (try)
modified: /trunk/src/mod_pubsub/node.template (try)
modified: /trunk/src/mod_pubsub/mod_pubsub.erl (try)
modified: /trunk/src/mod_pubsub/node_private.erl (try)
modified: /trunk/ChangeLog (try)
added: /trunk/src/mod_pubsub/node_mb.erl (try)
modified: /trunk/src/mod_pubsub/node_public.erl (try)
modified: /trunk/src/mod_pubsub/node_dispatch.erl (try)