title: javascript doesn't rendered arrow buttons in slick.js
body: <p>Hi i have problem while working with slick.js in fact javascript doesn't have rendered arrow buttons, even though value of arrows is true by default i set it on true value again, but it doesn't become  enabled.</p>
  
  <pre><code>$j(document).on('ready', function() {
  $j(".regular").slick({
    dots: false,
      infinite: false,
      rtl: true,
      arrows:true,
      prevArrow: '&lt;button&gt;&lt;img src="/skin/frontend/sbase/abzarmart/images/prvarw.svg"/&gt;&lt;/button&gt;',
      nextArrow: '&lt;button&gt;&lt;img src="/skin/frontend/sbase/abzarmart/images/nxtarw.svg"/&gt;&lt;/button&gt;',
      slidesToShow: 5,
      slidesToScroll: 5,
      responsive: [
          {
              breakpoint: 1024,
              settings: {
                  dots: false,
                  infinite: false,
                  slidesToShow: 4,
                  slidesToScroll: 4,
              }
          },
          {
              breakpoint: 600,
              settings: {
                  dots: false,
                  infinite: false,
                  slidesToShow: 3,
                  slidesToScroll: 3
              }
          },
          {
              breakpoint: 480,
              settings: {
                  dots: false,
                  infinite: false,
                  slidesToShow: 2,
                  slidesToScroll: 2
              }
          }
      ]
  });
  </code></pre>
  
  <p>});</p>
  
  <p>notice: i should be used $j for jquery because in my web site prototype.js was using!</p>