Add displaymath to MathJax setup
* lisp/org-html.el (org-export-html-mathjax-template): displaymath
environment and MathJax
Greetings All.
The following patch makes MathJax consider \begin{displaymath} and
\end{displaymath} as math environmetn boundaries. For someone who, like
me, keeps "The not so short introduction to LaTeX2e" alway around, the
displaymath environment is the default way to introduce a block of math.
In fact '\[' and '\]' are also mentioned there but the environment is
used in every single example so the patch minimizes the surprise.