rostermanager: "decorify" rostermanager, and make it an util.
metronome: drop rostermanager from loaded secondary libraries.
mod_roster: reflect related changes also hook for the initialize-roster event.
sessionmanager: code refactor ...
- drop import of rostermanager
- also fire initialize-roster event and don't forbid resource binding if there's
no roster
mod_presence: change code to reflect rostermanager "demotion".
mam.lib, pep_aux.lib: reflect changes to rostermanager.
mod_{admin_adhoc/disco/last_activity}: reflect changes to rostermanager.
configmanager: fix code layout a bit.
sessionmanager: fix syntax error.
mod_privacy: also reflect changes to rostermanager.
mod_roster: localize get_readonly_rosters() import.
mod_presence: perform a "waqas" a fix a traceback.
mod_presence: fix yet another traceback.
mod_presence: since there isn't two without three, another one...