data.content update with an animation way

[shenqihui]

Here I make a mr to due with #24 .
I thought I due with it in a bad way.
So, it's the example code.
I will glad if you were inspire with this code.
Just for love.
And d3pie is cool.

[shenqihui]

Hi Ben.
I just change the version code into 0.1.6 .
But i am worry that if you want the version upto 0.1.6 .
If no, contact me to change it back to 0.1.5, So that you can juse accept automatically.
And I am glad to do it.