Choose where to insert references instead of always being at the end

[ps-george]

Like TOC. e.g.

%% REFS

If no %% REFS in doc, don't print references.

[ymherklotz]

What if you don't want any references printed though? I would probably prefer if you always had to specify %% REFS if you want references, as one might have references in the markdown without wanting to print them sometimes?

Let me know what you think though.

[ps-george]

You're right - I agree with you completely. I'll edit the issue description.