title: Web link to specific whatsapp contact
body: <p>I'd like to place a link on a webpage which opens a whatsapp chat with a certain whatsapp contact. In other words: I want a "contact me by whatsapp" link to go next to the page's "Contact us my facebook/twitter/google+/etc" links. Something like:</p>
  
  <pre><code>href="whatsapp:contact=015555555555@s.whatsapp.com&amp;message="I'd like to chat with you"
  </code></pre>