Adds new image assets
Adds `.cta-short` extension of `.cta`

halves top & bottom padding on full-width cta block
Rewrites what was stitched-banner into something more flexible and sane
Adds some homepage-specific styling updates

Mostly to do with how the news feed articles are displayed across breakpoints
Adds background images to homepage 4-up grid section
Updates and extends `.cards` module for the homepage 4-up card block
Removes trailing backslash on $imagesFolder var

Was doubling up backslashes on me and 404-ing all my bg images...
Lightens the box shadow color on the homepage media feed image
Adds a new breakpoint to help with card shuffling across breakpoints.
Finalizes homepage markup
Updates homepage 4-up card markup

*  adds link to thumbnail image
*  adds excerpt missed on first pass
Adds microformatting classes for author meta on home news feed
Rewrites breadcrumb handling on single article view to better incorporate new stitched banner styling