The problem: - I have multiple versions of `pippo` and I wish a public documentation for each pippo version For example I wish to start to write the documentation for next pippo version but I don't know if I must create a new branch (for each pippo version a new doc branch) or we must go with [readthedocs](https://readthedocs.org/) that supports this feature and more (for example I like the search - I think that it can be very useful). I prefer a simple solution (I am happy to see that readthedocs supports markdown). What you say?