style links in post copy (see msg)

all links in post copy are posts are set to a unique cover.  the css is not really efficient: fixing this may be a post-launch task.
add <ol> and list items to "colophon" area
update colophon styles in desktop view (see msg)

-add comments for 'footer-inner-wrapper-class'
-add new classes: "colophon-list-class" and "colophon-list-item-class"
add comment in "_includes/footer_partial.html"
commit development & production copies of main stylesheet
change bg image in sprite
add logo-related classnames to <li> tags in #colophon-list
commit development & production copies of main stylesheet
change bg image dimensions for sprite
commit development & production copies of main stylesheet
update retina media queries (see msg)

-add classes for footer logos (jekyll, aws, maxcdn)
-update comments
add text-indent styling to "colophon-list-item-class"
commit development & production copies of main stylesheet
rename sprites (see msg)

-change 'snSprite.png' to 'kaidez-sprite.png'
-change 'snSprite@2x.png' to 'kaidez-sprite@2x.png'
-update sprite filename references in 'grunt/cssSource/_retinaMediaQuery.scss'
remove old sprites
commit development & production copies of main stylesheet
add links/link classes to colophone hrefs in <footer>
commit development & production copies of main stylesheet
commit development & production copies of main stylesheet
create @mixin footer-link-hit-area (see msg)

create '@mixin footer-link-hit-area' in grunt/cssSource/_base.scss, which creates a 'hit area for the footer links'.  apply it to the colophon-related link styles in 'grunt/cssSource/_desktopStyles.scss'.