func (m *Manifest) RemoveAnnotation(name string) error {
	acid, err := types.NewACIdentifier(name)
	if err != nil {
		return err
	}
	err = removeAnnotation(*acid, m.manifest)
	if err != nil {
		return err
	}
	return m.save()
}
RemoveAnnotation removes an annotation of name from the current manifest
package appc
import (
	"github.com/appc/spec/schema"
	"github.com/appc/spec/schema/types"
)
func (m *Manifest) AddAnnotation(name, value string) error {
	acid, err := types.NewACIdentifier(name)
	if err != nil {
		return err
	}
	m.manifest.Annotations.Set(*acid, value)
	return m.save()
}