title: Shopify: Include a template into another template
body: <p>I'm trying to customize a Shopify theme and I want to include a template into another template, but this seems to work for snippets only.</p>
  
  <p>Detailed: I want to add the login / register forms into a dropdown menu in the header which appears onlick.
  So I added to my theme.liquid file the following code:</p>
  
  <p>{% include 'customers/login' %}</p>
  
  <p>But this returns the following error:</p>
  
  <blockquote>
    <p>"Liquid error: Could not find asset snippets/customers/login.liquid"</p>
  </blockquote>
  
  <p>This means that include can be used only for snippets? No template can be included / called into another? Or am I missing something?</p>
  
  <p>Any way around this or a direct command for templates / pages?</p>