[Azoth Murm] Added Get{City,Country}() const.
[Azoth Murm] Added GetVCardRepresentation() for #1654.
[Azoth Xoox] Added GetVCardRepresentation() stub for #1654.
[Azoth] Added IMetaInfoEntry::GetVCardRepresentation() for #1654.
[Azoth MuC] Added entry resolving algo, closes #1655.
[Azoth MuC] Added basic /vcard command stubs for #1654.