support comments

[kowey]

Most of the work is there. We should have a DistilledComment type perhaps. The default converter could have an option to include comments or not.

[kowey]

Jasper points out Disqus should have WP comment import (if we never get around to this)

[Minoru]

To close this issue, the following has to be done:

• figure out how Wordpress exports comments. For Blogger, they're part of the usual dump. Is that so for Wordpress?
• make Hakyll.Convert.Wordpress.distill accept a Bool indicating if comments are to be exported. If it's True, comments should be put into the post's body, right at the end of it (see Blogger.hs:178-184 for what I mean);
• update help message (it currently says that we only export Blogger comments);
• without doubt, some common parts will present themselves. These should be factored out into Hakyll.Convert.Common. (And while we're at it, maybe turn that Bool into something more descriptive.) (Split out into Refactor parts of comments extraction to Hakyll.Convert.Common #13)

[Minoru]

The last item of the plan (the refactoring) was split out into #13.