Add import page template

cms/templates/import.html

+<%inherit file="base.html" />
+<%! from django.core.urlresolvers import reverse %>
+<%block name="title">Import</%block>
+<%block name="bodyclass">import</%block>
+
+<%block name="content">
+<div class="main-wrapper">
+  <div class="inner-wrapper">
+    <h1>Import</h1>
+    <form>
+      <p>Importing a new course will delete all course content currently associated with your course
+      and replace it with the contents of the uploaded file.</p>
+      <p>File uploads must be zip files containing, at a minimum, a <pre>course.xml</pre> file.</p>
+      <p><strong>Please note that if your course has any problems with auto-generated <pre>url_name</pre>s,
+      re-importing your course could cause the loss of student data associated with those problems.</p>
+      <p>Course to import: <input type="file" name="course-data"></p>
+      <input type="submit" value="Delete my course and re-import!">
+    </form>
+  </div>
+</div>
+</%block>
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