add @Kevin-M-Smith for #888
update mathjax CDN and use the correct syntax to typeset math
replace yandex.st with cdnjs.cloudflare.com

- upgraded datatables to 1.10.3
- cloudflare does not have r.min.js for highlight.js 7.3, so it was embdded in docco-classic.html
- adjusted width in docco-template.html
- upgraded to bootstrap 3.3.0 in the opencpu app
a simpler way to write Authors@R
I think it should be P
in the case of R Markdown v2 output, and figure environment is not needed, just use flushleft/center/flushright environments to align images

because the commands {\centering } {\hfill } will not work in Pandoc Markdown (curly braces will be escaped if there is no \begin{figure} \end{figure})
closes #626: automatically switch the plot hook according to the Pandoc output format

also closes #830, and closes rstudio/rmarkdown#303
bump version (a CRAN release should be ready now)