add text/markdown output

[stevengj]

Would be good to add a trivial writemime(io::IO, ::MIME"text/markdown", md::Content) method that just dumps the Markdown text.

This will be allow IJulia to send Markdown directly to IPython once ipython/ipython#4756 lands in a release, but is also useful in its own right.

[MikeInnes]

I actually overloaded text/plain originally to do just that, but it's commented out since it broke the terminal display. Once I've fixed that it'll be easy to add text/markdown as an alias.

Although, it's worth noting that Markdown.jl already supports text/html, so it should already work in IJulia to some extent.

[hayd]

(This was included in ipython 2.1.0)

[jiahao]

👍

I was using Markdown's parser to manipulate Markdown documents and I currently don't see a way to (say) take the first 2 sections of a Markdown document and save it as a new Markdown document (although I can save it as HTML).

[MikeInnes]

"text/plain" output is implemented on master now

[stevengj]

I don't see any text/markdown output.