removed the video background from the homepage temporarily.
created markup, styles & JS for the responsive nav component.
moved toolbar into configurable partial.
added quick actions nav (telephone, email & location) to the toggleable nav.
added close icon for the close button on the toggleable nav.
renamed images with @x2 to @2x.
fixed logo not showing on homepage.
added mixin for retina images.
fixed nav quick actions from wrapping on narrow view ports.
default border colour for a button is now white.
icons used on the site now have retina icons defined for them.
applied new toolbar partial to the about page and fixed a few issues with the various modes.
applied new toolbar to all pages and fixed IsLight now showing the light logo.
refactored toggleable nav to use seperate close / open buttons to make it easier to animate.
toggleable now uses animation to show / hide.
switched to using translate and quick actions no longer show on wider viewports.
merging feature/responsive-nav into master.