default_context.go
func (d *DefaultContext) Set(key string, value interface{}) {
	d.moot.Lock()
	d.data[key] = value
	d.moot.Unlock()
}
func (d *DefaultContext) Set(key string, value interface{}) {
	d.moot.Lock()
	d.data[key] = value
	d.moot.Unlock()
}
// Set a value onto the Context. Any value set onto the Context
// will be automatically available in templates.