LIL-146 Add deferred course

apps/course/templates/course/course.html

@@ -120,9 +120,16 @@
       </div>
       <a class="course__video video" href="#">
         <img class="video__pic" src="{% static 'img/video-1.jpg' %}">
+        {% if course.is_deferred_start %}
+        <div class="video__soon">
+          <div class="video__title">Курс начнется:</div>
+          <div class="video__time">{{ course.deferred_start_at_humanize }}</div>
+        </div>
+        {% else %}
         <svg class="icon icon-play">
           <use xlink:href="{% static 'img/sprite.svg' %}#icon-play"></use>
         </svg>
+        {% endif %}
       </a>
       <div class="course__share share share_sm">
         <div class="share__title">Поделиться курсом</div>