Avent 01 - Better AFSY logo + add rounded image

I've cherry-pick logo from @fzannettacci for a better integration into the page. The background is transparent & the logo is smaller:

![](http://f.cl.ly/items/2A2S1g2G3W262O3N3b2E/ScreenShot%202013-11-30%20%C3%A0%2019.11.25.png)

I've also rouned the maxime's avatar to fit the initial design:

![](http://f.cl.ly/items/1L1Z2A0K162K0T0E2X2h/ScreenShot%202013-11-30%20%C3%A0%2019.11.36.png)