• Improvements to .htaccess.
• Improve 404 design.
• Simplify JS folder structure.
• Change html IE class names changed to target ranges rather than
  specific versions of IE.
• Update CSS to include latest normalize.css changes and better
  typographic defaults
  (#825).
• Update to Modernizr 2.5 (includes yepnope 1.5 and html5shiv 3.2).
• Update to jQuery 1.7.1.
• Revert to async snippet for the Google Analytics script.
• Remove the ant build script
  (#826).
• Remove Respond.js
  (#816).
• Remove the demo/ directory
  (#808).
• Remove the test/ directory
  (#808).
• Remove Google Chrome Frame script for IE6 users; replace with links
  to Chrome Frame and options for alternative browsers.
• Remove initial-scale=1 from the viewport meta
  (#824).
• Remove defer from all scripts to avoid legacy IE bugs.
• Remove explicit Site Speed tracking for Google Analytics. It's now
  enabled by default.