Add Learner Analytics dashboard.

Add the back-end and front-end React app for Learner Analytics.
This was mostly authored by @AlasdairSwan and @dianakhuang.

LEARNER-3376

openedx/features/learner_analytics/templates/learner_analytics/dashboard.html

@@ -0,0 +1,68 @@
+## mako
+<%page expression_filter="h"/>
+
+<%! main_css = "style-main-v2" %>
+
+<%inherit file="../main.html" />
+<%namespace name='static' file='../static_content.html'/>
+<%def name="online_help_token()"><% return "courseware" %></%def>
+<%def name="course_name()">
+<% return _("{course_number} Courseware").format(course_number=course.display_number_with_default) %>
+</%def>
+
+<%!
+import json
+from django.utils.translation import ugettext as _
+
+from openedx.core.djangolib.markup import HTML
+from openedx.features.course_experience import course_home_page_title
+%>
+
+<%block name="bodyclass">course</%block>
+
+<%block name="pagetitle">${course_name()}</%block>
+
+<%include file="../courseware/course_navigation.html" args="active_page='learner_analytics'" />
+
+<%block name="content">
+<div class="course-view page-content-container" id="course-container">
+    <header class="page-header has-secondary">
+        ## TODO: LEARNER-3854: Clean-up after Learner Analytics test.
+        ##   May not need/want breadcrumbs?  Can maybe kill course_url and course_home_page_title
+        ##   from the context?
+        ## Breadcrumb navigation
+        <div class="page-header-main">
+            <nav aria-label="${_('Learner Analytics')}" class="sr-is-focusable" tabindex="-1">
+                <div class="has-breadcrumbs">
+                    <div class="breadcrumbs">
+                        <span class="nav-item">
+                            <a href="${course_url}">${course_home_page_title(course)}</a>
+                        </span>
+                        <span class="icon fa fa-angle-right" aria-hidden="true"></span>
+                        <span class="nav-item">${_('Learner Analytics')}</span>
+
+                    </div>
+                </div>
+            </nav>
+        </div>
+    </header>
+    <div class="page-content learner-analytics-dashboard-wrapper">
+        <div class="learner-analytics-dashboard">
+            ${static.renderReact(
+              component="LearnerAnalyticsDashboard",
+              id="react-learner-analytics-dashboard",
+              props={
+                'schedule': assignment_schedule,
+                'grading_policy': grading_policy,
+                'grades': assignment_grades,
+                'discussion_info': discussion_info,
+                'weekly_active_users': weekly_active_users,
+                'week_streak': week_streak,
+                'profile_images': profile_image_urls,
+              }
+            )}
+        </div>
+    </div>
+</div>
+</%block>
+<%namespace name='static' file='../static_content.html'/>