Merge pull request #1 from wbruno/master

Refatored to use Composite and Promises
Merge pull request #2 from wbruno/master

Improve code reducing the nested level and added jsHint
Update Grunt version
Clean HTML
Added Polyfill for old browsers
Clean code
Fix support for IE8
Added grunt-contrib-concat task
Update tasks
Clean code
Added concatenated version
Clean code
Update min version
Update Readme
Update Grunt task
Update min version
Added Pinterest
update build versions
Bumped version
Update example to use Pinterest