tags.go
func (client *Client) GetHostTags(host, source string) ([]string, error) {
	var out reqGetHostTags
	uri := "/v1/tags/hosts/" + host
	if source != "" {
		uri += "?source=" + source
	}
	if err := client.doJsonRequest("GET", uri, nil, &out); err != nil {
		return nil, err
	}
	return out.Tags, nil
}
func (client *Client) GetHostTags(host, source string) ([]string, error) {
	var out reqGetHostTags
	uri := "/v1/tags/hosts/" + host
	if source != "" {
		uri += "?source=" + source
	}
	if err := client.doJsonRequest("GET", uri, nil, &out); err != nil {
		return nil, err
	}
	return out.Tags, nil
}
// GetHostTags returns a slice of tags for a given host and source.