First alpha version v0.1.3-alpha1

**Features**

* Create bar chart directive.
* Create pie chart directive.
* Create one axis chart directive.
* Auto update bars from data changes in bar chart.
* Auto update arcs from data changes in pie chart.
* **Build**
	* Grunt configuration.
	* Travis integration.
	* Update version in bower file.
	* Add changelog file.

**Bug fixes**

* Fix error in size for bars in bar chart.
* Fix error in auto-update data in charts.