Minor typographic tweaks

I touched up a few spelling mistakes, missing words, and inappropriate apostrophes that caught my eye while I was reading.

Thanks for the article, it was a good read :grin:
Merge pull request #124 from smashwilson/patch-1

Minor typographic tweaks
resolve merge conflicts
also note contributors
Merge branch 'master' of https://github.com/benbalter/benbalter.github.com into patch-6

Conflicts:
	_posts/2014-06-02-how-to-identify-a-strong-open-source-project.md