title: Woocommerce get next / previous product SAME category
body: <p>I've read this:
  <a href="https://stackoverflow.com/questions/13597687/woocommerce-get-next-previous-product">Woocommerce get next / previous product</a></p>
  
  <p>and also tried this:</p>
  
  <p><code>&lt;?php previous_post_link('%link', 'Previous in category', TRUE); ?&gt;</code></p>
  
  <p>and any of them work under woocommerce product categpry, any idea?</p>
  
  <p>Thanks in advance!</p>