Markdown support

[SHiLLySiT]

Add support for markdown formatting within event cards.

[maxb2]

Markdown support would be great. I'd like to take the transcript of my story and version control it in a git repository. Perhaps even use it as a blog post.

[SHiLLySiT]

@maxb2 Are you requesting that a transcript be exported as markdown? This ticket was meant for adding support for markdown within IronWriter (updated description for clarity). Story export is covered in #14.

[maxb2]

Support within IronWriter would be even better. I've been writing markdown in IronWriter directly and then just copying that into a file after the session.

I'm wrote up an example journal in markdown if you want to check it out. I chose to represent the tags or other game mechanics as code.

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