Support for Pandoc-style code blocks (http://johnmacfarlane.net/pandoc/d...

...emo/example9/pandocs-markdown.html) and code span elements (http://daringfireball.net/projects
/markdown/syntax#code), which should not be rendered to LaTeX

I've made some modifications so that dollar signs within a couple of alternative code elements are not converted to LaTeX, ie

This is bash example `mv $1 $2`
And another example:
~~~{.bash}
$ rm $file
~~~