plugin XEP-0313: cleaning and improvments: - moved common namespaces to core.constants - removed useless dependencies and recommendations - removed all bride methods as they where there only for testing purpose - don't use a plugin dict to store MAM clients, put them in profiles' clients instead - removed message trigger in favor of an observer which is triggered only when specific queryid is used - new getArchives method which grab all result and return them all at once

[D-BUS Service]
Name=org.goffi.SAT
Exec=sat