WIP. Modal dialog box with indication to rotate phone.
Add popup which indicates that the user should rotate the phone.
Added auto scroll on mobile. Fix dialog box location when scrolled.
Abstracted mobile code to separate file. Added styling.
Renamed mobile to responsive and used document metrics to trigger scroll instead of user agent string.
Shifted show code box down.
Fix show code in mobile.
Comment to explain scroll.
fix dialog box height style.
Linter fixes.
Better supported unicode arrows.
Merge pull request #174 from tobyk100/image-rotate

Ready. Mobile and responsive stuff.