Wrapper doc format

[Ricardo Lafuente]

Hi all,

We've tried to come up with a consistent and effective style for the 
wrapper docs. See our take here:

https://hackmd.io/og2z-es-Svuju66N4wR8gA 
<https://hackmd.io/og2z-es-Svuju66N4wR8gA>

and from here we can have a starting point to discuss how things should 
look like in the end.