Ticket #197 (enhancement)

We are not setting cutype or rsvp. From the RFC

                (";" cutypeparam) / (";"memberparam) /
                (";" roleparam) / (";" partstatparam) /
                (";" rsvpparam) / (";" deltoparam) /
                (";" delfromparam) / (";" sentbyparam) /
                (";"cnparam) / (";" dirparam) /
                (";" languageparam) /

• role - already set
• partstat - already set
• cn is a name - we can leave that for the moment
• dir - url to a directory (e.g. ldap) leave for ythe moment
• member - leave this one
• cutype identifies the type of attendee - see below
• delto - a uri - required for delegating - already set
• delfrom - maybe set by system
• rsvp - a number of uses - may need to expose
• sentby - needs to be set by back end

     cutypeparam        = "CUTYPE" "="
                         ("INDIVIDUAL"          ; An individual
                        / "GROUP"               ; A group of individuals
                        / "RESOURCE"            ; A physical resource
                        / "ROOM"                ; A room resource
                        / "UNKNOWN"             ; Otherwise not known