Merge pull request #9 from yuhua-chen/will

Fix ripple effect for adding ripple-out css animation.
Update README
Merge pull request #10 from yuhua-chen/michael

Add a demo site link
Merge pull request #11 from yuhua-chen/will

Change default settings of ripple effect, fix few bugs and make animation more smoothly.
Update demo.gif
Merge pull request #12 from yuhua-chen/michael

Update demo.gif
Add transEnd callback function in settings and fix bug of touch event position on mobile device