Top menu navbar

#38 


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Collapsed state.
Current page has a darker grey background ("IBLI", a.k.a the homepage).

![nav1](https://cloud.githubusercontent.com/assets/3273122/2942135/3cfce094-d9b0-11e3-8dcb-68dbc86b1412.png)



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When clicking on them, the "Pages" and "Partners" items open their drop-down menu.

![nav3](https://cloud.githubusercontent.com/assets/3273122/2942121/00935b6a-d9b0-11e3-98fc-5173fd9d5e62.png)

![nav2](https://cloud.githubusercontent.com/assets/3273122/2942046/ef7db862-d9ae-11e3-8b21-950991025900.png)