Provide Pandoc JS-Library

[fishbone1]

Feature request:

The README says that you compiled Pandoc to JS. Would it be possible to provide this as a (separate) JS library / module? This would allow to build document conversion in our own JS programs. E.g. I wrote a NodeJS script that needs to convert Markdown to Textile.

[ali-abrar]

This is relevant: https://github.com/mt-caret/pandoc-ghcjs