bouil/angular-google-chart — pull request #97 by raphaelboukara (2014-07-01 13:07:19+00:00)
Title: add ratio to chart

In our project we needed a graph with grids forming a square.
The difficulty lies in the fact that our project is responsive. When changing the size of the window width of the graph changes but not the height.
I propose to change the height of a graph using a ratio that the Directive receives.
Thus the graph keeps fixed proportions user.

Here an example:
![ex](https://cloud.githubusercontent.com/assets/6442236/3443278/8ee38f92-0120-11e4-8a81-3dfb40623352.png)