Merge pull request #7 from yuhua-chen/Amin

Fix effectElem animation in js , add ripple css animation.
Implement it as jQuery Plugin.
Merge pull request #8 from yuhua-chen/michael

Implement it as jQuery Plugin.
Add a demo image and update README
Fix broken demo link
Fix ripple effect for adding ripple-out css animation.
Remove some unnecessary js code & fix css animation code for consistent.
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
Fix multiple click bug, Change default ripple color to white.
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