Add retracting sidebar for tablets
Add first draft of single column design for phones
Increase size of nav button touch target area
Add language tabs to navbar on phone
Update nav button to go to very edge of screen
Add extra margin to nav touch targets on mobile
Hide mobile lang selector and search on print
Add new screenshot to README
Update readme with responsive notes
Fix bug with messed up margin on some code samples on phones
Add background to nav button
Re-rotate nav button image
Add note to readme about sauce labs
Add note to readme about Travis-ci and Mozilla