add floatlabels.js

floatlabels.js - Follows the famous Float Label Pattern. Built on jQuery.

source: https://github.com/clubdesign/floatlabels.js/ (version from .js files)

floatlabels.js has 439 stars, 35 watchers and 18 forks so it's kinda popular.

I got the files from the website: http://clubdesign.github.io/floatlabels.js/