Organized CSS into separate files; design progress towards goal
docpad.coffee: Use better file watching algorithms
Updated nav to hide submenus unless currently in that part of the site
Update navigation colors (and retrace CSS/Stylus source)
index.css.styl: simplified nav border-radius code
Updated files to use variable for site prefix
Merge branch 'refs/heads/ghi-4-navigation-styles' into source

* refs/heads/ghi-4-navigation-styles:
  Updated files to use variable for site prefix
  index.css.styl: simplified nav border-radius code
  Update navigation colors (and retrace CSS/Stylus source)
  Updated nav to hide submenus unless currently in that part of the site
Clean up nav menu markup + styles
Merge branch 'refs/heads/ghi-4-navigation-styles' into source

* refs/heads/ghi-4-navigation-styles:
  Clean up nav menu markup + styles