Merge pull request #1511 from breethomas/master

Redesign
Move redesign config helpers
Support login/logout in redesign
Tweak redesign footer
Add placeholder pages for exercise listings. Fixes #1488
Remove unused style guide file
Add caret svg to icons
Refactor top-nav
Add typography style
Style getting started page
Setup base of the blog page
Style help page
Merge pull request #1514 from breethomas/master

Redesign