mini.go
func (config *Config) Integer(key string, def int64) int64 {
	return getInteger(config.values, key, def)
}
func (config *Config) Integer(key string, def int64) int64 {
	return getInteger(config.values, key, def)
}
/*
Integer looks for the specified key and returns it as an int. If not found the default value def is returned.
*/