Merge pull request #28 from cclaiborne/master

Close #8 Chapter 3 needs conversion to Markdown
Hide and nest hints. Rearrange reading assingments.
Merge pull request #30 from codefellows/br-edits

Hide and nest hints. Rearrange reading assignments.
Close #32 Chapter 3 needs more formatting, before students access today
Close #29 Students are still using system git
Merge pull request #33 from codefellows/erik_edits

Close #29 and #32
Merge master
Change 'a post' to 'an article'
Convert post<space> to article<space>.
Convert <space>post to <space>article.
Convert Post to Article.
Convert _post to _article.
Update watch_this.md
Merge pull request #34 from codefellows/br-edits

Closes #31
Change post to article in Summary.md
Hotifx for 3.4.2 nav
Merge master
Fix chapter 3 link.
Hotfix for 3.4.2.2 nav.
Hotfix for 3.4.2.2 nav.