fix formatting of index page

Author: jcjohnson

index.html

@@ -16,6 +16,7 @@
 
     <div class="module-header">Winter 2016 Assignments</div>
 
+    <div class="materials-item">
       <a href="assignments2016/assignment1/">
         Assignment #1: Image Classification, kNN, SVM, Softmax
       </a>
@@ -41,7 +42,6 @@
       </a>
     </div>
 
-
     <div class="module-header">Module 0: Preparation</div>
 
     <div class="materials-item">