Merge branch 'core-issue-81' into 'master'

Use bootstrap buttons. Advances BiscuIT-ng#81.

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!6

biscuit/apps/alsijil/templates/alsijil/group_week.html

@@ -14,7 +14,9 @@
     <ul id="timetable_select_form">
       {{ select_form.as_ul }}
     </ul>
-    <input type="submit" value="Select" />
+    <button type="submit" class="btn btn-primary">
+      {% blocktrans %}Select{% endblocktrans %}
+    </button>
   </form>
 
   {% if group %}

biscuit/apps/alsijil/templates/alsijil/lesson.html

@@ -65,6 +65,8 @@
         </table>
       </div>
     </div>
-    <input type="submit" value="{% blocktrans %}Save{% endblocktrans %}" />
+    <button type="submit" class="btn btn-primary">
+      {% blocktrans %}Save{% endblocktrans %}
+    </button>
   </form>
 {% endblock %}