Add clips to the sidebar

Author: logankilpatrick

website/_layout/sidebar.html

@@ -21,6 +21,7 @@ <h2>Math from computation, math with computation</h2>
 <a class="sidebar-nav-item {{ispage /installation/}}active{{end}}" href="/installation/">Software installation</a>
 <a class="sidebar-nav-item {{ispage /cheatsheets/}}active{{end}}" href="/cheatsheets/">Cheatsheets</a>
 <a class="sidebar-nav-item {{ispage /semesters/}}active{{end}}" href="/semesters/">Previous semesters</a>
+<a class="sidebar-nav-item {{ispage /clips/}}active{{end}}" href="/clips/">Submit Short Clips</a>
 <br>
 <div class="course-section">Module 1: Images, Transformations, Abstractions</div>
 <a class="sidebar-nav-item {{ispage /images/}}active{{end}}" href="/images/"><b>1.1</b> - <em>Images as Data and Arrays</em></a>
@@ -60,4 +61,4 @@ <h2>Math from computation, math with computation</h2>
 </nav>
 </div>
 </div>
-<div class="content container">
+<div class="content container">