Merge branch 'JefferyFan-iissnan-master'

Author: iissnan

layout/_scripts/mathjax.swig

@@ -18,5 +18,7 @@
   });
 </script>
 
-<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+<script type="text/javascript" src="http://cdn.staticfile.org/mathjax/2.4.0/MathJax.js"></script>
+<script type="text/javascript" src="http://cdn.staticfile.org/mathjax/2.4.0/config/TeX-AMS-MML_HTMLorMML.js"></script>
+
 {% endif %}