concourse.go
func (s *ConcoursePipeline) AddGithubResource(name string, source map[string]interface{}) {
	s.AddResource(name, GithubResourceName, source)
}
func (s *ConcoursePipeline) AddGithubResource(name string, source map[string]interface{}) {
	s.AddResource(name, GithubResourceName, source)
}
//AddGithubResource github specific resource add