(feat) Add unique template menu.html for customer and restaurant

After authentication works out (i.e. differentiating between customer and restaurant users), the user will be shown the appropriate menu.

![screen shot 2014-09-05 at 1 56 07 pm](https://cloud.githubusercontent.com/assets/6935952/4171637/3deb5a54-353f-11e4-9911-1d70184d45a1.png)

![screen shot 2014-09-05 at 1 56 22 pm](https://cloud.githubusercontent.com/assets/6935952/4171639/3eb08f9a-353f-11e4-9a4e-966ff62ff291.png)