adding calendar and fixing mobile nav

Author: Dreadwall

_layouts/coursepage.html

@@ -9,8 +9,10 @@
     <!-- Bootstrap -->
     <link href="css/bootstrap.min.css" rel="stylesheet" media="screen">
 
+    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
+
+    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
 
-    <link href="extra.css" rel="stylesheet">
 
     <meta http-equiv="Content-Script-Type" content="text/javascript" />
     </script>
@@ -38,6 +40,7 @@
           <li><a href="index.html">Home</a></li>
           <li><a href="lectures.html">Lectures</a></li>
           <li><a href="announcements.html">Announcements</a></li>
+          <li><a href="calendar.html">Office Hours</a></li>
           <li><a href="https://docs.google.com/document/d/11_S7uBTa9uLkdFdahG0B_O0B5Gv7jKxullORvAb2snY/edit?usp=sharing">Syllabus</a></li>
           <li><a href="assignments.html">Assignments</a></li>
         </ul>
@@ -54,10 +57,5 @@ <h1>{{ page.title }}</h1>
     {{ content }}
 
 
-    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
-    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
-    <!-- Include all compiled plugins (below), or include individual files as needed -->
-    <script src="js/bootstrap.min.js"></script>
-
   </body>
 </html>

calendar.html

@@ -0,0 +1,6 @@
+---
+layout: coursepage
+title: 15-441/641 Calendar
+---
+
+<iframe src="https://calendar.google.com/calendar/embed?showPrint=0&amp;showTabs=0&amp;showCalendars=0&amp;showTz=0&amp;mode=WEEK&amp;height=600&amp;wkst=1&amp;bgcolor=%23FFFFFF&amp;src=andrew.cmu.edu_sgsmj292rv6b89vruo5u1m2fb8%40group.calendar.google.com&amp;color=%2342104A&amp;ctz=America%2FNew_York" style="border-width:0" width="800" height="600" frameborder="0" scrolling="no"></iframe>

index.html

@@ -6,7 +6,7 @@
 <!-- ANNOUNCEMENTS: TEMPLATED --!>
 
 {% assign frontpage = site.announcements | reverse %}
-{% for announcement in frontpage limit:3%}
+{% for announcement in frontpage limit:1%}
 <div class="alert alert-info alert-dismissable">
 	<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
 <table>