[better nav] bigger search + simpler html

#### Better nav: responsiveness (NOT FINISHED YET)

:heavy_check_mark: Make the search bar responsive (which it was not)
:heavy_check_mark: Simplify the nav bar and move away from bootstrap
:heavy_check_mark: Search bar bigger


#### Result

###### Desktop
![capture d ecran 2014-10-01 a 18 41 12](https://cloud.githubusercontent.com/assets/2462303/4479180/d9c01ea0-498b-11e4-9387-bbbbbc253ec7.png)

###### Mobile
![capture d ecran 2014-10-01 a 18 41 26](https://cloud.githubusercontent.com/assets/2462303/4479183/e1d7dd62-498b-11e4-859b-262244ee4325.png)

###### Took care of the loader
![](http://g.recordit.co/G1Jm2mFwjy.gif)

#### Known Issue

Logo order
![capture d ecran 2014-10-01 a 18 54 06](https://cloud.githubusercontent.com/assets/2462303/4479190/eeba3bd8-498b-11e4-9005-dbb0ee2b4346.png)

Dropdown out of screen
![capture d ecran 2014-10-01 a 18 54 30](https://cloud.githubusercontent.com/assets/2462303/4479194/f5a7732a-498b-11e4-8343-9965d61cd14c.png)