[RFC] June Newsletter

I've finished writing the first draft of the June newsletter. The whole thing can be read [here](https://github.com/jdavis/neovim.github.io/blob/6ad81ab94c932484ac7d178b48d13f68bab9c3e1/_posts/2014-06-06-a-new-hope.md).

As @justinmk mentioned (https://github.com/neovim/neovim/issues/771#issuecomment-44793038), the dev-wiki and neovim.org should probably be merged. This ignores that for right now as I'm working on it within my [`merge-dev-wiki` branch](https://github.com/jdavis/neovim.github.io/tree/merge-dev-wiki) and just adds a `news/` page that shows the latest newsletter post. A direct link to the newsletter can be accessed by going to `/newsletter/YYYY/MM/DD/filename/` or in this case, `/newsletter/2014/06/06/a-new-hope/`.

There also is a simple feed in [news.xml](https://github.com/jdavis/neovim.github.io/blob/newsletter/news.xml).

Let me know what issues you see or if I missed anything big; I'm sure I did :smile:. I've been reading through Issues/commits for hours. It was fun :grinning: 

I'm pinging a few of developers so they take a look at things since it involves some of their changes: @philix, @elmart, @stefan991, @aktau, @Hinidu

Here's how it is rendered on the webpage zoomed out (also ignore the nav, it isn't in this PR, I was on the `merge-dev-wiki` branch):
![screen shot 2014-06-06 at 2 26 57 am](https://cloud.githubusercontent.com/assets/157801/3197579/0cabee58-ed4c-11e3-8bd8-663d4f58ec00.png)
![screen shot 2014-06-06 at 2 27 11 am](https://cloud.githubusercontent.com/assets/157801/3197580/0cad1792-ed4c-11e3-8578-991ead2e620f.png)

Thanks all.