func RegisterSourceOrDie(name string, src IssueSource) {
	if _, ok := sources[name]; ok {
		glog.Fatalf("Cannot register an IssueSource with name %q, already exists!", name)
	}
	sources[name] = src
	glog.Infof("Registered issue source '%s'.", name)
}
func RegisterSourceOrDie(name string, src IssueSource) {
	if _, ok := sources[name]; ok {
		glog.Fatalf("Cannot register an IssueSource with name %q, already exists!", name)
	}
	sources[name] = src
	glog.Infof("Registered issue source '%s'.", name)
}
// RegisterSourceOrDie registers a source of auto-filed issues.