Add theming hooks to (old) landing page

Adjust the now-defunct landing page so that it doesn't render much
of the edX-specific marketing info (social links, press releases,
university partners, etc.) if a theme is enabled.

Additionally, if the Stanford theme is enabled, add in some school-
specific language and adjust the video modal to play a Stanford one.

lms/templates/course.html

 <%namespace name='static' file='static_content.html'/>
+<%namespace file='main.html' import="stanford_theme_enabled"/>
 <%!
     from django.core.urlresolvers import reverse
     from courseware.courses import course_image_url, get_course_about_section
@@ -24,7 +25,11 @@
           <p>${get_course_about_section(course, 'short_description')}</p>
         </div>
         <div class="bottom">
+          % if stanford_theme_enabled():
+            <span class="university">${get_course_about_section(course, 'university')}</span>
+          % else:
             <a href="${reverse('university_profile', args=[course.org])}" class="university">${get_course_about_section(course, 'university')}</a>
+          % endif
           <span class="start-date">${course.start_date_text}</span>
         </div>
       </section>

lms/templates/index.html

@@ -8,10 +8,16 @@
     <div class="outer-wrapper">
       <div class="title">
         <hgroup>
+          % if self.stanford_theme_enabled():
+            <h1>Free courses from <strong>Stanford</strong></h1>
+          % else:
             <h1>The Future of Online Education</h1>
+          % endif
           <h2>For anyone, anywhere, anytime</h2>
         </hgroup>
 
+        ## Disable social buttons for non-edX sites
+        % if not self.theme_enabled():
           <section class="actions">
             <div class="main-cta">
               <a href="#signup-modal" id="signup_action" class="find-courses" rel="leanModal">Sign Up</a>
@@ -32,6 +38,7 @@
               </div>
             </div>
           </section>
+        % endif
       </div>
 
         <a href="#video-modal" class="media" rel="leanModal">
@@ -45,6 +52,8 @@
 
   <section class="container">
     <section class="highlighted-courses">
+      ## Disable university partner logos and sites for non-edX sites
+      % if not self.theme_enabled():
         <h2>Explore free courses from <span class="edx">edX</span> universities</h2>
 
         <section class="university-partners university-partners2x6">
@@ -152,6 +161,7 @@
             </li>
           </ol>
         </section>
+      % endif
 
       <section class="courses">
           <ul class="courses-listing">
@@ -165,6 +175,8 @@
     </section>
   </section>
 
+  ## Disable press and marketing for non-edX sites
+  % if not self.theme_enabled():
     <section class="container">
       <section class="more-info">
         <header>
@@ -200,12 +212,19 @@
         </section>
       </section>
     </section>
+  % endif
 
 </section>
 
 <section id="video-modal" class="modal home-page-video-modal video-modal">
   <div class="inner-wrapper">
-    <iframe width="640" height="360" src="http://www.youtube.com/embed/XNaiOGxWeto?showinfo=0" frameborder="0" allowfullscreen></iframe>
+    <%
+      if self.stanford_theme_enabled():
+        youtube_video_id = "2gmreZObCY4"
+      else:
+        youtube_video_id = "XNaiOGxWeto"
+    %>
+    <iframe width="640" height="360" src="http://www.youtube.com/embed/${youtube_video_id}?showinfo=0" frameborder="0" allowfullscreen></iframe>
   </div>
 </section>