Fixed links in upcoming section on index page

templates/index.html

@@ -111,7 +111,7 @@
 							<ul class="list-group" style="margin: 0px;">
 								{% for i in g.list %}
 								<li class="list-group-item list-group-item-condensed">
-									{{i.time|time}} <a href="{{url_for('course', id=i.course_id)}}">{{i.course.title}}</a>: <a href="{{url_for('course', id=i.course_id)}}#lecture-{{i.id}}">{{i.title}}</a> {{livelabel(i.live, False)}}
+									{{i.time|time}} <a href="{{url_for('course', handle=i.course.handle)}}">{{i.course.title}}</a>: <a href="{{url_for('course', handle=i.course.handle)}}#lecture-{{i.id}}">{{i.title}}</a> {{livelabel(i.live, False)}}
 								</li>
 								{% endfor %}
 							</ul>