Suggestion of regorganizing Docs Menu

[RicoSaupe]

I was looking at the navigation and was having some doubts here. I thought of simplifying the structure a little. I'd go not any deeper than that but I think it makes navigation more clean. What do you think?

One more question. How do we differentiate what belongs to "How do I ..." and Faq?

[RicoSaupe]

Can be closed since #323 is merged.