Switch to jQuery 1.x

There still seem to be quite some number of users with MSIE 8 and 7
coming to hosted Weblate.

fixes rb#22
fixes rb#21
fixes rb#20
fixes rb#19
fixes rb#18
fixes rb#17
fixes rb#16
fixes rb#15
fixes rb#45
fixes rb#46
fixes rb#47
fixes rb#48
fixes rb#49
fixes rb#50
fixes rb#51
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/html/base.html

@@ -24,7 +24,7 @@
   <link rel="stylesheet" type="text/css" href="{% get_media_prefix %}bootstrap/css/datepicker3.css" />
   <link rel="stylesheet" type="text/css" href="{% get_media_prefix %}chartist.min.css" />
   <link rel="stylesheet" type="text/css" href="{% get_media_prefix %}style-bootstrap.css" />
-  <script src="{% get_media_prefix %}js/jquery-2.1.3.min.js" type="text/javascript"></script>
+  <script src="{% get_media_prefix %}js/jquery-1.11.3.min.js" type="text/javascript"></script>
   <script src="{% get_media_prefix %}js/jquery.cookie.js" type="text/javascript"></script>
   <script src="{% get_media_prefix %}js/jquery.autosize.min.js" type="text/javascript"></script>
   <script src="{% get_media_prefix %}js/jquery.sortElements.js" type="text/javascript"></script>