Emit no_consent when M_CONSENT_NOT_GIVEN received (#647)

src/http-api.js

@@ -433,6 +433,12 @@ module.exports.MatrixHttpApi.prototype = {
         requestPromise.catch(function(err) {
             if (err.errcode == 'M_UNKNOWN_TOKEN') {
                 self.event_emitter.emit("Session.logged_out");
+            } else if (err.errcode == 'M_CONSENT_NOT_GIVEN') {
+                self.event_emitter.emit(
+                    "no_consent",
+                    err.message,
+                    err.data.consent_uri,
+                );
             }
         });