Reformat Contacts into list of contact items

Contact items (facebook, twitter, irc, mailing lists ...) should be restructured into a list/set of objects with following attributes:
- name (optional): human readable description
- type: type of contact (irc, facebook, mailinglist, twitter, mail, webform, wiki, ...)
- value: information to use this contact, in URI format, or user-name where no well-defined scheme exists (mailto:example-list@sample.freifunk.net, but @FreifunkSampleTown)
- display (optional): short, ready-for-display version of this item.
- priority (optional): positive, non-zero integer with lower numbers denoting higher priority

the format of the value attribute should be a consciece, maschine-readable representation of the information. If display is not given it may be assumed identical to value. Depending on the type additional, pre-parsed information may be present. e.g. type=irc may contain hostname, port, channel, flags while email may contain email, contactname, subject. Such fields, if defined are optional.

A basic set of such types should be defined as part of the specification and should be understood by clients adhering to this specification.