Shortened the class names for the skip link CSS.
Progress polyfill: Cleaned up the progress polyfill, added CSS and working examples
Merge pull request #3294 from thomasgohard/skip-link-optimization

Shortened the class names for the skip link CSS.
Merge pull request #3289 from pjackson28/cleanupprogresspolyfill

Progress polyfill: Cleaned up the progress polyfill, added CSS and working examples
Data Ajax: Merged data-after, data-append, data-before and data-replace and added data-prepend