Fix anchors for table of contents.
Add a few missing words.
Merge pull request #1753 from sethoscope/typos

fix minor issues in README files
Fix for #1506 and fix for button layout

Mostly change styles, re-parent check/hide answer buttons

	modified:   templates/exams/view_exam.html
Merge branch 'master' of https://github.com/Stanford-Online/class2go into wescott-master-exercise-work