typed.go
func (t Typed) TimeOr(key string, d time.Time) time.Time {
	if value, exists := t.TimeIf(key); exists {
		return value
	}
	return d
}
func (t Typed) TimeOr(key string, d time.Time) time.Time {
	if value, exists := t.TimeIf(key); exists {
		return value
	}
	return d
}
// Returns a time at the key, or the specified
// value if it doesn't exist or isn't a time