General updates to 2014-06-23-introduction.md

* Adds screenshot of watch list, so users who aren't familiar with github know where to go.
* Cuts out superfluous and repetitious language.
My thinking with the original phrasing is to leave the door open for some of these bullets to not happen -- this phrasing suggests we're going to get to everything eventually. For the first blog post, I'm a little more concerned about it feeling proclamation-y than our general issue/comment work. And so it's clear, I think the document prep tools are the ones I feel the most iffy about. What do you think?