Added AnythingSlider and Galleriffic

AnythingSlider has more than 870 stargazers and 200 forks and it's a
powerful slider for jQuery. I added both the compressed and uncompressed
version, plus the CSS file. :)

Link to github repo: https://github.com/CSS-Tricks/AnythingSlider

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Galleriffic is a jQuery plugin that provides a rich, post-back free experience optimized to handle high volumes of photos while conserving bandwidth. It's widely used across the web and can be absolutely useful to a lot of people to have it in CDNJS. :)

Link to website