insert new paragraph

I got tired creating huge dashboard,
(too many mouse click when I need some new chart on the top of dashboard!) 

now we can insert new paragraph using button.

![screen shot 2014-10-27 at 2 58 52 pm](https://cloud.githubusercontent.com/assets/5210115/4786835/d68540fc-5da0-11e4-9b16-39e26e2ffa2d.png)

here's result.

![screen shot 2014-10-27 at 2 58 59 pm](https://cloud.githubusercontent.com/assets/5210115/4786836/d68b3bb0-5da0-11e4-99a3-d138ee071ba0.png)

From my code, we cannot add new paragraph from the last paragraph. (added alert)