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