[REQUEST] Add responsive view toggle

[Daniel Lewandowski]

Would be awesome to have the ability to resize the viewport to preview at various widths. Similar to this styleguide from Huge: http://hugeinc.github.io/styleguide/demo/index.html

[Rodney Leviton]

Agreed. This is a feature I would like to implement without the <iframe> tag as per most implementations. Also as this is a theme level feature I will be moving this issue to the default swanky-theme.