Updated _responsive.scss with latest changes to the master project on GitHub.
Cleaned up formatting and adjusted to match _s output.
Moved to SCSS format and changed extension to .scss to take advantage of @extend in calling genericons classes.
Changed call from vanilla-CSS genericons file to converted SCSS genericons file.
Unhid the footer
converted more calculated values to Sass function calls; changed pagination classes to match _s output
Changed .toggle-search element to more properly (and accessibly) use genericons.