Adds calendar to a contract
Combine event reservations, opportunities and quotations
Disable mass mailing to partners by default (opt-out)
mailing list, contacts, fields
Allows to set attendee languages
Allows sell registrations with more than one attendee
Automatically subscribe partners to its company's business documents
Adds active feature on mailing list contact and subscriptions
Links mailing.contacts with res.partners.
Archive/unarchvice mailing list contact through partner
Track contact's subscription date to mailing lists
Send notification emails when contacts subscription changes.
