docs versions

[simboonlong]

maybe can have v2, v3 docs. how about v1? nv heard alot about that

[Nebulis]

Between v2 and v3, the difference is very subtle, not sure it's a good idea to have a separate doc for this. However it opens to another problem.

If we centralise all the documentation about our libraries, then how do we create a specific version of the documentation, when there is a breaking change in one library only?