Add support for LaTeX to MathML conversion
* lisp/org.el (org-latex-to-mathml-jar-file)
(org-latex-to-mathml-convert-command): New user-customizable
variables.
(org-format-latex-mathml-available-p, org-create-math-formula)
(org-format-latex-as-mathml): New functions.
(org-format-latex): Add a new local variable block-type that
notes the nature of the equation - inline or display.
Associate it's value to `org-latex-src-embed-type' property of
dvipng links. Add mathml as new processing type.
Patch by Jambunathan.