gadget-manager: remove gabble_olpc_gadget_manager_{request,create,ensure}_channel and use gabble_olpc_gadget_manager_handle_request directly
gadget-manager: remove gabble_olpc_gadget_manager_{request,create,ensure}_channel and use gabble_olpc_gadget_manager_handle_request directly

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