11th - Added IE Edge and Web fonts variables.

Gruntfile.js - Added ie_edge and web_fonts variables to Jekyll.
README.js - Updated To-Do to revisit SVG support.
_settings.scss - Updated $base-font-color and reorganized variables.
foot.html - Updated "if" statements.
head.html - Added ie_edge "if" statement. Removed sitemap.xml link.
project.json - Added ie_edge and web_fonts variables.