Minibri Temp - Asciidoc support

Minibri Temp now supports files formatted in Asciidoc. The uploaded file needs to have .adoc or .asciidoc extension to go through Asciidoc conversion.

Check out an example of a rendered document at https://temp.minibri.com/view/asciidoc-guide.

The source file of 6000+ lines which generated the above output can be found at this gist.