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Resolve o #79 
![captura de tela de 2014-07-23 18 57 47](https://cloud.githubusercontent.com/assets/1594658/3681296/cc8528ca-12b8-11e4-86de-2151c6ecc50b.png)
![captura de tela de 2014-07-23 19 14 27](https://cloud.githubusercontent.com/assets/1594658/3681297/cc854bf2-12b8-11e4-8450-83f5d003b67a.png)
![captura de tela de 2014-07-23 19 14 32](https://cloud.githubusercontent.com/assets/1594658/3681298/cc8759e2-12b8-11e4-9ae5-38dd5b8cfaa5.png)