when this command is used:
- an email invitation is sent with the event node set
- invitee's jid is affiliated to event
- invitee's jid is affiliated to invitee's node as a publisher
- invitee's jid is affiliated to blog's node as a member
- invitee's jid is affiliated to every blog's item's comments node as a publisher
last affiliation complex operation is currently needed because of the way blogs and comments are handled, but this need to be changed in the future with XEP proposal.
- event node is handling the main metadata of the event, and invitees node handle the invitations/invitees answers
- invitees and blog node are automatically created and associated to the event, except if they are specified (in which cas the existing one are used and attached to the event node)
- extra metadata are added to <meta> elements