Another try for fixing ">" comparison for Octopress

[bdillahu]

Fixing usage with Octopress where ">" comparison doesn't work. Based on info from https://github.com/soonhokong pull request

I'm not a great Ruby person, so this may still have issues, but it seems like its been working for me.

You do have to be careful if you're changing layouts or something to actually touch the index files that are affected.

[belkadan]

I don't understand why > comparison doesn't just work when Time includes Comparable. I'm not actively focused on my jekyll fork right now, but I haven't even looked at the error on 1.9.2, and I'm guessing that this is not the problem.

[bdillahu]

I'm afraid answering the "why > doesn't work" is beyond me at the moment. I understand the issue that this probably isn't the best fix, but wanted to offer it up in case it was some help.

Thanks for all your work on this fork!