MUC plugin import
Enable muc support for XMPP
Fine mucCreate and mucJoin festures
Chat rooms discovery
Join room
Migrate XMPP to wss://
Handlers MUST return true
XMPP MUC autojoin
Too many changes
Merge from dev
Merge branch 'dev' into xmpp-muc
Merge branch 'dev' into xmpp-muc
Merge branch 'dev' into xmpp-muc

Conflicts:
	scripts/loqui/connectors/xmpp.js
	scripts/loqui/providers.js
Retrieve from muc only new messages
Muc search l10n string
Better MUC offline message retrieve
Better MUC offline message retrieve
Merge branch 'xmpp-muc' of https://github.com/loqui/im into xmpp-muc

Conflicts:
	scripts/loqui/connectors/xmpp.js
Exit from WhatsApp groups
Working disconnect button in WhatsApp