envy.go
func Set(key string, value string) {
	gil.Lock()
	defer gil.Unlock()
	env[key] = value
}
func Set(key string, value string) {
	gil.Lock()
	defer gil.Unlock()
	env[key] = value
}
// Set a value into the ENV. This is NOT permanent. It will
// only affect values accessed through envy.