Move these poor files to A Better Place
Revert "Convert Jira description & comment bodies to markdown using Marksy"

This reverts commit e7b567113f9ee3bc5ebadb1e8c018dd42d32ffa3.

The API stopped working. I thought it was because I'd been rate
limited but here I am like a day later and it's still broken. I think
I broke it.
Convert description & comment body to Markdown. Fixes #15

This is a crazy and roundabout way of doing things but was the only
way I could find to do it.

First we use an undocumented Jira API call to render the Jira markup
as HTML. Then we use the reverse_markdown gem to convert the HTML to
Markdown. Phew.