iq: Implement the Iq*Payload traits on every possible payload.

src/jingle.rs

@@ -12,6 +12,7 @@ use jid::Jid;
 
 use error::Error;
 use ns;
+use iq::IqSetPayload;
 
 generate_attribute!(Action, "action", {
     ContentAccept => "content-accept",
@@ -305,6 +306,8 @@ pub struct Jingle {
     pub other: Vec<Element>,
 }
 
+impl IqSetPayload for Jingle {}
+
 impl Jingle {
     pub fn new(action: Action, sid: SessionId) -> Jingle {
         Jingle {