Add GTalk 03 video capabilities
Add GTalk 03 video capabilities

add GTAlk dialect 03 video capabilities as that is supported by the Google web
client. Also if we want to know if a specific dialect supports video, ask if it
supports video not ask if it's part of a certain dialect family

community-ssu/telepathy-gabble,mlundblad/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble