Summaries on main page and better separation

This separates the posts on the main page a little better.  Also shows summary rather than full content...  though we could rip out the summary bit if anyone is strongly opposed
I think I'd rather do the READMORE approach so that we can specify exactly where it gets cut off. Basically, we put READMORE in the text of our articles where we want the summary to stop:

http://middlemanapp.com/basics/blogging/#article-summaries